configure.ac

   1 #   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2 #   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012,
   3 #   2014, 2015, 2016 Free Software Foundation, Inc.
   4 #
   5 # This file is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.
  18
  19 ##############################################################################
  20 ### WARNING: this file contains embedded tabs.  Do not run untabify on this file.
  21
  22 m4_include(config/acx.m4)
  23 m4_include(config/override.m4)
  24 m4_include(config/proginstall.m4)
  25 m4_include(config/elf.m4)
  26 m4_include([libtool.m4])
  27 m4_include([ltoptions.m4])
  28 m4_include([ltsugar.m4])
  29 m4_include([ltversion.m4])
  30 m4_include([lt~obsolete.m4])
  31 m4_include([config/isl.m4])
  32
  33 AC_INIT(move-if-change)
  34 AC_DISABLE_OPTION_CHECKING
  35
  36 progname=$0
  37 # if PWD already has a value, it is probably wrong.
  38 if test -n "$PWD" ; then PWD=`${PWDCMD-pwd}`; fi
  39
  40 # Export original configure arguments for use by sub-configures.
  41 # Quote arguments with shell meta charatcers.
  42 TOPLEVEL_CONFIGURE_ARGUMENTS=
  43 set -- "$progname" "$@"
  44 for ac_arg
  45 do
  46   case "$ac_arg" in
  47   *" "*|*"      "*|*[[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\']]*)
  48     ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"`
  49     # if the argument is of the form -foo=baz, quote the baz part only
  50     ac_arg=`echo "'$ac_arg'" | sed "s/^'\([[-a-zA-Z0-9]]*=\)/\\1'/"` ;;
  51   *) ;;
  52   esac
  53   # Add the quoted argument to the list.
  54   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS $ac_arg"
  55 done
  56 if test "$silent" = yes; then
  57   TOPLEVEL_CONFIGURE_ARGUMENTS="$TOPLEVEL_CONFIGURE_ARGUMENTS --silent"
  58 fi
  59 # Remove the initial space we just introduced and, as these will be
  60 # expanded by make, quote '$'.
  61 TOPLEVEL_CONFIGURE_ARGUMENTS=`echo "x$TOPLEVEL_CONFIGURE_ARGUMENTS" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
  62 AC_SUBST(TOPLEVEL_CONFIGURE_ARGUMENTS)
  63
  64 # Find the build, host, and target systems.
  65 ACX_NONCANONICAL_BUILD
  66 ACX_NONCANONICAL_HOST
  67 ACX_NONCANONICAL_TARGET
  68
  69 dnl Autoconf 2.5x and later will set a default program prefix if
  70 dnl --target was used, even if it was the same as --host.  Disable
  71 dnl that behavior.  This must be done before AC_CANONICAL_SYSTEM
  72 dnl to take effect.
  73 test "$host_noncanonical" = "$target_noncanonical" &&
  74   test "$program_prefix$program_suffix$program_transform_name" = \
  75     NONENONEs,x,x, &&
  76   program_transform_name=s,y,y,
  77
  78 AC_CANONICAL_SYSTEM
  79 AC_ARG_PROGRAM
  80
  81 m4_pattern_allow([^AS_FOR_TARGET$])dnl
  82 m4_pattern_allow([^AS_FOR_BUILD$])dnl
  83
  84 # Get 'install' or 'install-sh' and its variants.
  85 AC_PROG_INSTALL
  86 ACX_PROG_LN
  87 AC_PROG_LN_S
  88 AC_PROG_SED
  89 AC_PROG_AWK
  90
  91 srcpwd=`cd ${srcdir} ; ${PWDCMD-pwd}`
  92
  93 # We pass INSTALL explicitly to sub-makes.  Make sure that it is not
  94 # a relative path.
  95 if test "$INSTALL" = "${srcdir}/install-sh -c"; then
  96   INSTALL="${srcpwd}/install-sh -c"
  97 fi
  98
  99 # Set srcdir to "." if that's what it is.
 100 # This is important for multilib support.
 101 pwd=`${PWDCMD-pwd}`
 102 if test "${pwd}" = "${srcpwd}" ; then
 103   srcdir=.
 104 fi
 105
 106 topsrcdir=$srcpwd
 107
 108 extra_host_args=
 109
 110 ### To add a new directory to the tree, first choose whether it is a target
 111 ### or a host dependent tool.  Then put it into the appropriate list
 112 ### (library or tools, host or target), doing a dependency sort.
 113
 114 # Subdirs will be configured in the order listed in build_configdirs,
 115 # configdirs, or target_configdirs; see the serialization section below.
 116
 117 # Dependency sorting is only needed when *configuration* must be done in
 118 # a particular order.  In all cases a dependency should be specified in
 119 # the Makefile, whether or not it's implicitly specified here.
 120
 121 # Double entries in build_configdirs, configdirs, or target_configdirs may
 122 # cause circular dependencies and break everything horribly.
 123
 124 # these library is used by various programs built for the build
 125 # environment
 126 #
 127 build_libs="build-libiberty build-libcpp"
 128
 129 # these tools are built for the build environment
 130 build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"
 131
 132 # these libraries are used by various programs built for the host environment
 133 #f
 134 host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libbacktrace libcpp libdecnumber gmp mpfr mpc isl libelf libiconv libctf"
 135
 136 # these tools are built for the host environment
 137 # Note, the powerpc-eabi build depends on sim occurring before gdb in order to
 138 # know that we are building the simulator.
 139 # binutils, gas and ld appear in that order because it makes sense to run
 140 # "make check" in that particular order.
 141 # If --enable-gold is used, "gold" may replace "ld".
 142 host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools libcc1 gotools"
 143
 144 # these libraries are built for the target environment, and are built after
 145 # the host libraries and the host tools (which may be a cross compiler)
 146 # Note that libiberty is not a target library.
 147 target_libraries="target-libgcc \
 148                 target-libbacktrace \
 149                 target-libgloss \
 150                 target-newlib \
 151                 target-libgomp \
 152                 target-liboffloadmic \
 153                 target-libhsail-rt \
 154                 target-libatomic \
 155                 target-libitm \
 156                 target-libstdc++-v3 \
 157                 target-libsanitizer \
 158                 target-libvtv \
 159                 target-libssp \
 160                 target-libquadmath \
 161                 target-libgfortran \
 162                 target-libffi \
 163                 target-libobjc \
 164                 target-libada \
 165                 target-libgo \
 166                 target-libphobos \
 167                 target-zlib"
 168
 169 # these tools are built using the target libraries, and are intended to
 170 # run only in the target environment
 171 #
 172 # note: any program that *uses* libraries that are in the "target_libraries"
 173 # list belongs in this list.
 174 #
 175 target_tools="target-rda"
 176
 177 ################################################################################
 178
 179 ## All tools belong in one of the four categories, and are assigned above
 180 ## We assign ${configdirs} this way to remove all embedded newlines.  This
 181 ## is important because configure will choke if they ever get through.
 182 ## ${configdirs} is directories we build using the host tools.
 183 ## ${target_configdirs} is directories we build using the target tools.
 184 configdirs=`echo ${host_libs} ${host_tools}`
 185 target_configdirs=`echo ${target_libraries} ${target_tools}`
 186 build_configdirs=`echo ${build_libs} ${build_tools}`
 187
 188 m4_divert_text([PARSE_ARGS],
 189 [case $srcdir in
 190   *" "*)
 191 m4_pushdef([AS_MESSAGE_LOG_FD], [])dnl
 192     AC_MSG_ERROR([path to source, $srcdir, contains spaces])
 193 m4_popdef([AS_MESSAGE_LOG_FD])dnl
 194     ;;
 195 esac
 196 ac_subdirs_all=`cd $srcdir && echo */configure | sed 's,/configure,,g'`
 197 ])
 198
 199 ################################################################################
 200
 201 srcname="gnu development package"
 202
 203 # This gets set non-empty for some net releases of packages.
 204 appdirs=""
 205
 206 # Define is_cross_compiler to save on calls to 'test'.
 207 is_cross_compiler=
 208 if test x"${host}" = x"${target}" ; then
 209   is_cross_compiler=no
 210 else
 211   is_cross_compiler=yes
 212 fi
 213
 214 # Find the build and target subdir names.
 215 GCC_TOPLEV_SUBDIRS
 216 # Be sure to cover against remnants of an in-tree build.
 217 if test $srcdir != .  && test -d $srcdir/host-${host_noncanonical}; then
 218   AC_MSG_ERROR([building out of tree but $srcdir contains host-${host_noncanonical}.
 219 Use a pristine source tree when building in a separate tree])
 220 fi
 221
 222 # Skipdirs are removed silently.
 223 skipdirs=
 224 # Noconfigdirs are removed loudly.
 225 noconfigdirs=""
 226
 227 use_gnu_ld=
 228 # Make sure we don't let GNU ld be added if we didn't want it.
 229 if test x$with_gnu_ld = xno ; then
 230   use_gnu_ld=no
 231   noconfigdirs="$noconfigdirs ld gold"
 232 fi
 233
 234 use_gnu_as=
 235 # Make sure we don't let GNU as be added if we didn't want it.
 236 if test x$with_gnu_as = xno ; then
 237   use_gnu_as=no
 238   noconfigdirs="$noconfigdirs gas"
 239 fi
 240
 241 use_included_zlib=
 242 AC_ARG_WITH(system-zlib,
 243 [AS_HELP_STRING([--with-system-zlib], [use installed libz])])
 244 # Make sure we don't let ZLIB be added if we didn't want it.
 245 if test x$with_system_zlib = xyes ; then
 246   use_included_zlib=no
 247   noconfigdirs="$noconfigdirs zlib"
 248 fi
 249
 250 # some tools are so dependent upon X11 that if we're not building with X,
 251 # it's not even worth trying to configure, much less build, that tool.
 252
 253 case ${with_x} in
 254   yes | "") ;; # the default value for this tree is that X11 is available
 255   no)
 256     skipdirs="${skipdirs} tk itcl libgui"
 257     # We won't be able to build gdbtk without X.
 258     enable_gdbtk=no
 259     ;;
 260   *)  echo "*** bad value \"${with_x}\" for -with-x flag; ignored" 1>&2 ;;
 261 esac
 262
 263 # Some are only suitable for cross toolchains.
 264 # Remove these if host=target.
 265 cross_only="target-libgloss target-newlib target-opcodes"
 266
 267 case $is_cross_compiler in
 268   no) skipdirs="${skipdirs} ${cross_only}" ;;
 269 esac
 270
 271 # If both --with-headers and --with-libs are specified, default to
 272 # --without-newlib.
 273 if test x"${with_headers}" != x && test x"${with_headers}" != xno \
 274    && test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
 275   if test x"${with_newlib}" = x ; then
 276     with_newlib=no
 277   fi
 278 fi
 279
 280 # Recognize --with-newlib/--without-newlib.
 281 case ${with_newlib} in
 282   no) skipdirs="${skipdirs} target-newlib" ;;
 283   yes) skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'` ;;
 284 esac
 285
 286 AC_ARG_ENABLE(as-accelerator-for,
 287 [AS_HELP_STRING([--enable-as-accelerator-for=ARG],
 288                 [build as offload target compiler.
 289                 Specify offload host triple by ARG])])
 290
 291 AC_ARG_ENABLE(offload-targets,
 292 [AS_HELP_STRING([--enable-offload-targets=LIST],
 293                 [enable offloading to devices from comma-separated LIST of
 294                 TARGET[=DIR]. Use optional path to find offload target compiler
 295                 during the build])],
 296 [
 297   if test x"$enable_offload_targets" = x; then
 298     AC_MSG_ERROR([no offload targets specified])
 299   fi
 300 ], [enable_offload_targets=])
 301
 302 # Handle --enable-gold, --enable-ld.
 303 # --disable-gold [--enable-ld]
 304 #     Build only ld.  Default option.
 305 # --enable-gold [--enable-ld]
 306 #     Build both gold and ld.  Install gold as "ld.gold", install ld
 307 #     as "ld.bfd" and "ld".
 308 # --enable-gold=default [--enable-ld]
 309 #     Build both gold and ld.  Install gold as "ld.gold" and "ld",
 310 #     install ld as "ld.bfd".
 311 # --enable-gold[=default] --disable-ld
 312 #     Build only gold, which is then installed as both "ld.gold" and "ld".
 313 # --enable-gold --enable-ld=default
 314 #     Build both gold (installed as "ld.gold") and ld (installed as "ld"
 315 #     and ld.bfd).
 316 #     In other words, ld is default
 317 # --enable-gold=default --enable-ld=default
 318 #     Error.
 319
 320 default_ld=
 321 AC_ARG_ENABLE(gold,
 322 [AS_HELP_STRING([[--enable-gold[=ARG]]],
 323                 [build gold @<:@ARG={default,yes,no}@:>@])],
 324 ENABLE_GOLD=$enableval,
 325 ENABLE_GOLD=no)
 326 case "${ENABLE_GOLD}" in
 327   yes|default)
 328     # Check for ELF target.
 329     is_elf=no
 330     case "${target}" in
 331       *-*-elf* | *-*-sysv4* | *-*-unixware* | *-*-eabi* | hppa*64*-*-hpux* \
 332       | *-*-linux* | *-*-gnu* | frv-*-uclinux* | *-*-irix5* | *-*-irix6* \
 333       | *-*-netbsd* | *-*-openbsd* | *-*-freebsd* | *-*-dragonfly* \
 334       | *-*-solaris2* | *-*-nto* | *-*-nacl*)
 335         case "${target}" in
 336           *-*-linux*aout* | *-*-linux*oldld*)
 337             ;;
 338           *)
 339             is_elf=yes
 340             ;;
 341         esac
 342     esac
 343
 344     if test "$is_elf" = "yes"; then
 345       # Check for target supported by gold.
 346       case "${target}" in
 347         i?86-*-* | x86_64-*-* | sparc*-*-* | powerpc*-*-* | arm*-*-* \
 348         | aarch64*-*-* | tilegx*-*-* | mips*-*-* | s390*-*-*)
 349           configdirs="$configdirs gold"
 350           if test x${ENABLE_GOLD} = xdefault; then
 351             default_ld=gold
 352           fi
 353           ENABLE_GOLD=yes
 354           ;;
 355       esac
 356     fi
 357     ;;
 358   no)
 359     ;;
 360   *)
 361     AC_MSG_ERROR([invalid --enable-gold argument])
 362     ;;
 363 esac
 364
 365 AC_ARG_ENABLE(ld,
 366 [AS_HELP_STRING([[--enable-ld[=ARG]]],
 367                 [build ld @<:@ARG={default,yes,no}@:>@])],
 368 ENABLE_LD=$enableval,
 369 ENABLE_LD=yes)
 370
 371 case "${ENABLE_LD}" in
 372   default)
 373     if test x${default_ld} != x; then
 374       AC_MSG_ERROR([either gold or ld can be the default ld])
 375     fi
 376     ;;
 377   yes)
 378     ;;
 379   no)
 380     if test x${ENABLE_GOLD} != xyes; then
 381       AC_MSG_WARN([neither ld nor gold are enabled])
 382     fi
 383     configdirs=`echo " ${configdirs} " | sed -e 's/ ld / /'`
 384     ;;
 385   *)
 386     AC_MSG_ERROR([invalid --enable-ld argument])
 387     ;;
 388 esac
 389
 390 # PR gas/19109
 391 # Decide the default method for compressing debug sections.
 392 # Provide a configure time option to override our default.
 393 AC_ARG_ENABLE(compressed_debug_sections,
 394 [AS_HELP_STRING([--enable-compressed-debug-sections={all,gas,gold,ld,none}],
 395                 [Enable compressed debug sections for gas, gold or ld by
 396                  default])],
 397 [
 398   if test x"$enable_compressed_debug_sections" = xyes; then
 399     AC_MSG_ERROR([no program with compressed debug sections specified])
 400   fi
 401 ], [enable_compressed_debug_sections=])
 402
 403 # Configure extra directories which are host specific
 404
 405 case "${host}" in
 406   *-cygwin*)
 407     configdirs="$configdirs libtermcap" ;;
 408 esac
 409
 410 # A target can indicate whether a language isn't supported for some reason.
 411 # Only spaces may be used in this macro; not newlines or tabs.
 412 unsupported_languages=
 413
 414 # Remove more programs from consideration, based on the host or
 415 # target this usually means that a port of the program doesn't
 416 # exist yet.
 417
 418 case "${host}" in
 419   i[[3456789]]86-*-msdosdjgpp*)
 420     noconfigdirs="$noconfigdirs tcl tk itcl"
 421     ;;
 422 esac
 423
 424
 425 AC_ARG_ENABLE(libquadmath,
 426 AS_HELP_STRING([--disable-libquadmath],
 427   [do not build libquadmath directory]),
 428 ENABLE_LIBQUADMATH=$enableval,
 429 ENABLE_LIBQUADMATH=yes)
 430 if test "${ENABLE_LIBQUADMATH}" = "no" ; then
 431   noconfigdirs="$noconfigdirs target-libquadmath"
 432 fi
 433
 434
 435 AC_ARG_ENABLE(libquadmath-support,
 436 AS_HELP_STRING([--disable-libquadmath-support],
 437   [disable libquadmath support for Fortran]),
 438 ENABLE_LIBQUADMATH_SUPPORT=$enableval,
 439 ENABLE_LIBQUADMATH_SUPPORT=yes)
 440 enable_libquadmath_support=
 441 if test "${ENABLE_LIBQUADMATH_SUPPORT}" = "no" ; then
 442   enable_libquadmath_support=no
 443 fi
 444
 445
 446 AC_ARG_ENABLE(libada,
 447 [AS_HELP_STRING([--enable-libada], [build libada directory])],
 448 ENABLE_LIBADA=$enableval,
 449 ENABLE_LIBADA=yes)
 450 if test "${ENABLE_LIBADA}" != "yes" ; then
 451   noconfigdirs="$noconfigdirs gnattools"
 452 fi
 453
 454 AC_ARG_ENABLE(libssp,
 455 [AS_HELP_STRING([--enable-libssp], [build libssp directory])],
 456 ENABLE_LIBSSP=$enableval,
 457 ENABLE_LIBSSP=yes)
 458
 459 AC_ARG_ENABLE(libstdcxx,
 460 AS_HELP_STRING([--disable-libstdcxx],
 461   [do not build libstdc++-v3 directory]),
 462 ENABLE_LIBSTDCXX=$enableval,
 463 ENABLE_LIBSTDCXX=default)
 464 [if test "${ENABLE_LIBSTDCXX}" = "no" ; then
 465   noconfigdirs="$noconfigdirs target-libstdc++-v3"
 466 fi]
 467
 468 # If this is accelerator compiler and its target is intelmic we enable
 469 # target liboffloadmic by default.  If this is compiler with offloading
 470 # for intelmic we enable host liboffloadmic by default.  Otherwise
 471 # liboffloadmic is disabled by default.
 472 AC_ARG_ENABLE([liboffloadmic],
 473 AC_HELP_STRING([[--enable-liboffloadmic[=ARG]]],
 474                [build liboffloadmic @<:@ARG={no,host,target}@:>@]),
 475 [case "$enableval" in
 476   no | host | target)
 477     enable_liboffloadmic=$enableval ;;
 478   *)
 479     AC_MSG_ERROR([--enable-liboffloadmic=no/host/target]) ;;
 480 esac],
 481 [if test x"$enable_as_accelerator_for" != x; then
 482   case "${target}" in
 483     *-intelmic-* | *-intelmicemul-*)
 484       enable_liboffloadmic=target
 485       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=target"
 486       ;;
 487     *)
 488       enable_liboffloadmic=no
 489       ;;
 490   esac
 491 else
 492   case "${enable_offload_targets}" in
 493     *-intelmic-* | *-intelmicemul-*)
 494       enable_liboffloadmic=host
 495       extra_liboffloadmic_configure_flags="--enable-liboffloadmic=host"
 496       ;;
 497     *)
 498       enable_liboffloadmic=no
 499       ;;
 500     esac
 501 fi])
 502 AC_SUBST(extra_liboffloadmic_configure_flags)
 503
 504 # Enable libgomp by default on hosted POSIX systems, and a few others.
 505 if test x$enable_libgomp = x ; then
 506     case "${target}" in
 507     *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 508         ;;
 509     *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly*)
 510         ;;
 511     *-*-solaris2* | *-*-hpux11*)
 512         ;;
 513     *-*-darwin* | *-*-aix*)
 514         ;;
 515     nvptx*-*-*)
 516         ;;
 517     *)
 518         noconfigdirs="$noconfigdirs target-libgomp"
 519         ;;
 520     esac
 521 fi
 522
 523 # Disable libatomic on unsupported systems.
 524 if test -d ${srcdir}/libatomic; then
 525     if test x$enable_libatomic = x; then
 526         AC_MSG_CHECKING([for libatomic support])
 527         if (srcdir=${srcdir}/libatomic; \
 528                 . ${srcdir}/configure.tgt; \
 529                 test -n "$UNSUPPORTED")
 530         then
 531             AC_MSG_RESULT([no])
 532             noconfigdirs="$noconfigdirs target-libatomic"
 533         else
 534             AC_MSG_RESULT([yes])
 535         fi
 536     fi
 537 fi
 538
 539 # Disable liboffloadmic on unsupported systems.
 540 if test -d ${srcdir}/liboffloadmic; then
 541     if test x$enable_liboffloadmic != xno; then
 542         AC_MSG_CHECKING([for liboffloadmic support])
 543         if (srcdir=${srcdir}/liboffloadmic; \
 544                 . ${srcdir}/configure.tgt; \
 545                 test -n "$UNSUPPORTED")
 546         then
 547             AC_MSG_RESULT([no])
 548             noconfigdirs="$noconfigdirs target-liboffloadmic"
 549         else
 550             AC_MSG_RESULT([yes])
 551         fi
 552     fi
 553 fi
 554
 555 # Disable libitm on unsupported systems.
 556 if test -d ${srcdir}/libitm; then
 557     if test x$enable_libitm = x; then
 558         AC_MSG_CHECKING([for libitm support])
 559         if (srcdir=${srcdir}/libitm; \
 560                 . ${srcdir}/configure.tgt; \
 561                 test -n "$UNSUPPORTED")
 562         then
 563             AC_MSG_RESULT([no])
 564             noconfigdirs="$noconfigdirs target-libitm"
 565         else
 566             AC_MSG_RESULT([yes])
 567         fi
 568     fi
 569 fi
 570
 571 # Disable libsanitizer on unsupported systems.
 572 if test -d ${srcdir}/libsanitizer; then
 573     if test x$enable_libsanitizer = x; then
 574         AC_MSG_CHECKING([for libsanitizer support])
 575         if (srcdir=${srcdir}/libsanitizer; \
 576                 . ${srcdir}/configure.tgt; \
 577                 test -n "$UNSUPPORTED")
 578         then
 579             AC_MSG_RESULT([no])
 580             noconfigdirs="$noconfigdirs target-libsanitizer"
 581         else
 582             AC_MSG_RESULT([yes])
 583         fi
 584     fi
 585 fi
 586
 587 # Disable libvtv on unsupported systems.
 588 if test -d ${srcdir}/libvtv; then
 589     if test x$enable_libvtv = x; then
 590         AC_MSG_CHECKING([for libvtv support])
 591         if (srcdir=${srcdir}/libvtv; \
 592                 . ${srcdir}/configure.tgt; \
 593                 test "$VTV_SUPPORTED" != "yes")
 594         then
 595             AC_MSG_RESULT([no])
 596             noconfigdirs="$noconfigdirs target-libvtv"
 597         else
 598             AC_MSG_RESULT([yes])
 599         fi
 600     fi
 601 fi
 602
 603
 604 # Disable libhsail-rt on unsupported systems.
 605 if test -d ${srcdir}/libhsail-rt; then
 606     if test x$enable_libhsail_rt = x; then
 607         AC_MSG_CHECKING([for libhsail-rt support])
 608         if (srcdir=${srcdir}/libhsail-rt; \
 609                 . ${srcdir}/configure.tgt; \
 610                 test -n "$UNSUPPORTED")
 611         then
 612             AC_MSG_RESULT([no])
 613             unsupported_languages="$unsupported_languages brig"
 614             # This implicitly disables also target-libhsail-rt as it won't
 615             # get added to the build without BRIG FE.
 616         else
 617             AC_MSG_RESULT([yes])
 618         fi
 619     fi
 620 fi
 621
 622
 623 # Disable libquadmath for some systems.
 624 case "${target}" in
 625   avr-*-*)
 626     noconfigdirs="$noconfigdirs target-libquadmath"
 627     ;;
 628   # libquadmath is unused on AIX and libquadmath build process use of
 629   # LD_LIBRARY_PATH can break AIX bootstrap.
 630   powerpc-*-aix* | rs6000-*-aix*)
 631     noconfigdirs="$noconfigdirs target-libquadmath"
 632     ;;
 633 esac
 634
 635 # Disable libssp for some systems.
 636 case "${target}" in
 637   avr-*-*)
 638     # No hosted I/O support.
 639     noconfigdirs="$noconfigdirs target-libssp"
 640     ;;
 641   powerpc-*-aix* | rs6000-*-aix*)
 642     noconfigdirs="$noconfigdirs target-libssp"
 643     ;;
 644   pru-*-*)
 645     # No hosted I/O support.
 646     noconfigdirs="$noconfigdirs target-libssp"
 647     ;;
 648   rl78-*-*)
 649     # libssp uses a misaligned load to trigger a fault, but the RL78
 650     # doesn't fault for those - instead, it gives a build-time error
 651     # for explicit misaligned loads.
 652     noconfigdirs="$noconfigdirs target-libssp"
 653     ;;
 654   visium-*-*)
 655     # No hosted I/O support.
 656     noconfigdirs="$noconfigdirs target-libssp"
 657     ;;
 658 esac
 659
 660 # Disable libstdc++-v3 for some systems.
 661 # Allow user to override this if they pass --enable-libstdc++-v3
 662 if test "${ENABLE_LIBSTDCXX}" = "default" ; then
 663   case "${target}" in
 664     *-*-vxworks*)
 665       # VxWorks uses the Dinkumware C++ library.
 666       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 667       ;;
 668     arm*-wince-pe*)
 669       # the C++ libraries don't build on top of CE's C libraries
 670       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 671       ;;
 672     avr-*-*)
 673       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 674       ;;
 675     ft32-*-*)
 676       noconfigdirs="$noconfigdirs target-libstdc++-v3"
 677       ;;
 678   esac
 679 fi
 680
 681 # Disable D on systems where it is known to not work.
 682 # For testing, you can override this with --enable-languages=d.
 683 case ,${enable_languages}, in
 684   *,d,*)
 685     ;;
 686   *)
 687     case "${target}" in
 688       *-*-darwin*)
 689         unsupported_languages="$unsupported_languages d"
 690         ;;
 691     esac
 692     ;;
 693 esac
 694
 695 # Disable libphobos on unsupported systems.
 696 # For testing, you can override this with --enable-libphobos.
 697 if test -d ${srcdir}/libphobos; then
 698     if test x$enable_libphobos = x; then
 699         AC_MSG_CHECKING([for libphobos support])
 700         if (srcdir=${srcdir}/libphobos; \
 701                 . ${srcdir}/configure.tgt; \
 702                 test "$LIBPHOBOS_SUPPORTED" != "yes")
 703         then
 704             AC_MSG_RESULT([no])
 705             noconfigdirs="$noconfigdirs target-libphobos"
 706         else
 707             AC_MSG_RESULT([yes])
 708         fi
 709     fi
 710 fi
 711
 712 # Disable Fortran for some systems.
 713 case "${target}" in
 714   mmix-*-*)
 715     # See <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00572.html>.
 716     unsupported_languages="$unsupported_languages fortran"
 717     ;;
 718 esac
 719
 720 # Disable libffi for some systems.
 721 case "${target}" in
 722   powerpc-*-darwin*)
 723     ;;
 724   i[[3456789]]86-*-darwin*)
 725     ;;
 726   x86_64-*-darwin[[912]]*)
 727     ;;
 728   *-*-darwin*)
 729     noconfigdirs="$noconfigdirs target-libffi"
 730     ;;
 731   *-*-netware*)
 732     noconfigdirs="$noconfigdirs target-libffi"
 733     ;;
 734   *-*-phoenix*)
 735     noconfigdirs="$noconfigdirs target-libffi"
 736     ;;
 737   *-*-rtems*)
 738     noconfigdirs="$noconfigdirs target-libffi"
 739     ;;
 740   *-*-tpf*)
 741     noconfigdirs="$noconfigdirs target-libffi"
 742     ;;
 743   *-*-uclinux*)
 744     noconfigdirs="$noconfigdirs target-libffi"
 745     ;;
 746   *-*-vxworks*)
 747     noconfigdirs="$noconfigdirs target-libffi"
 748     ;;
 749   aarch64*-*-freebsd*)
 750     noconfigdirs="$noconfigdirs target-libffi"
 751     ;;
 752   alpha*-*-*vms*)
 753     noconfigdirs="$noconfigdirs target-libffi"
 754     ;;
 755   arm*-*-freebsd*)
 756     noconfigdirs="$noconfigdirs target-libffi"
 757     ;;
 758   arm-wince-pe)
 759     noconfigdirs="$noconfigdirs target-libffi"
 760     ;;
 761   arm*-*-symbianelf*)
 762     noconfigdirs="$noconfigdirs target-libffi"
 763     ;;
 764   cris-*-* | crisv32-*-*)
 765     case "${target}" in
 766       *-*-linux*)
 767         ;;
 768       *) # See PR46792 regarding target-libffi.
 769         noconfigdirs="$noconfigdirs target-libffi";;
 770     esac
 771     ;;
 772   hppa*64*-*-hpux*)
 773     noconfigdirs="$noconfigdirs target-libffi"
 774     ;;
 775   hppa*-hp-hpux11*)
 776     ;;
 777   hppa*-*-hpux*)
 778     noconfigdirs="$noconfigdirs target-libffi"
 779     ;;
 780   ia64*-*-*vms*)
 781     noconfigdirs="$noconfigdirs target-libffi"
 782     ;;
 783   i[[3456789]]86-w64-mingw*)
 784     noconfigdirs="$noconfigdirs target-libffi"
 785     ;;
 786   i[[3456789]]86-*-mingw*)
 787     noconfigdirs="$noconfigdirs target-libffi"
 788     ;;
 789   x86_64-*-mingw*)
 790     noconfigdirs="$noconfigdirs target-libffi"
 791     ;;
 792   mmix-*-*)
 793     noconfigdirs="$noconfigdirs target-libffi"
 794     ;;
 795   powerpc-*-aix*)
 796     ;;
 797   rs6000-*-aix*)
 798     ;;
 799   ft32-*-*)
 800     noconfigdirs="$noconfigdirs target-libffi"
 801     ;;
 802   *-*-lynxos*)
 803     noconfigdirs="$noconfigdirs target-libffi"
 804     ;;
 805 esac
 806
 807 # Disable the go frontend on systems where it is known to not work. Please keep
 808 # this in sync with contrib/config-list.mk.
 809 case "${target}" in
 810 *-*-darwin* | *-*-cygwin* | *-*-mingw*)
 811     unsupported_languages="$unsupported_languages go"
 812     ;;
 813 esac
 814
 815 # Disable libgo for some systems where it is known to not work.
 816 # For testing, you can easily override this with --enable-libgo.
 817 if test x$enable_libgo = x; then
 818     case "${target}" in
 819     *-*-darwin*)
 820         # PR 46986
 821         noconfigdirs="$noconfigdirs target-libgo"
 822         ;;
 823     *-*-cygwin* | *-*-mingw*)
 824         noconfigdirs="$noconfigdirs target-libgo"
 825         ;;
 826     esac
 827 fi
 828
 829 # Default libgloss CPU subdirectory.
 830 libgloss_dir="$target_cpu"
 831
 832 case "${target}" in
 833   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
 834     libgloss_dir=wince
 835     ;;
 836   aarch64*-*-* )
 837     libgloss_dir=aarch64
 838     ;;
 839   arm*-*-*)
 840     libgloss_dir=arm
 841     ;;
 842   cris-*-* | crisv32-*-*)
 843     libgloss_dir=cris
 844     ;;
 845   hppa*-*-*)
 846     libgloss_dir=pa
 847     ;;
 848   i[[3456789]]86-*-*)
 849     libgloss_dir=i386
 850     ;;
 851   m68hc11-*-*|m6811-*-*|m68hc12-*-*|m6812-*-*)
 852     libgloss_dir=m68hc11
 853     ;;
 854   m68*-*-* | fido-*-*)
 855     libgloss_dir=m68k
 856     ;;
 857   mips*-*-*)
 858     libgloss_dir=mips
 859     ;;
 860   powerpc*-*-*)
 861     libgloss_dir=rs6000
 862     ;;
 863   pru-*-*)
 864     libgloss_dir=pru
 865     ;;
 866   sparc*-*-*)
 867     libgloss_dir=sparc
 868     ;;
 869 esac
 870
 871 # Disable newlib and libgloss for various target OSes.
 872 case "${target}" in
 873   alpha*-dec-osf*)
 874     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 875     ;;
 876   i[[3456789]]86-*-linux*)
 877     # This section makes it possible to build newlib natively on linux.
 878     # If we are using a cross compiler then don't configure newlib.
 879     if test x${is_cross_compiler} != xno ; then
 880       noconfigdirs="$noconfigdirs target-newlib"
 881     fi
 882     noconfigdirs="$noconfigdirs target-libgloss"
 883     # If we are not using a cross compiler, do configure newlib.
 884     # Note however, that newlib will only be configured in this situation
 885     # if the --with-newlib option has been given, because otherwise
 886     # 'target-newlib' will appear in skipdirs.
 887     ;;
 888   i[[3456789]]86-*-rdos*)
 889     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 890     ;;
 891   sh*-*-pe|mips*-*-pe|arm-wince-pe)
 892     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 893     ;;
 894   sparc-*-sunos4*)
 895     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 896     ;;
 897   *-*-aix*)
 898     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 899     ;;
 900   *-*-beos*)
 901     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 902     ;;
 903   *-*-chorusos)
 904     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 905     ;;
 906   *-*-dragonfly*)
 907     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 908     ;;
 909   *-*-freebsd*)
 910     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 911     ;;
 912   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
 913     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 914     ;;
 915   *-*-lynxos*)
 916     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 917     ;;
 918   *-*-mingw*)
 919     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 920     ;;
 921   *-*-netbsd*)
 922     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 923     ;;
 924   *-*-netware*)
 925     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 926     ;;
 927   *-*-tpf*)
 928     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 929     ;;
 930   *-*-uclinux*)
 931     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 932     ;;
 933   *-*-vxworks*)
 934     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
 935     ;;
 936 esac
 937
 938 case "${target}" in
 939   *-*-chorusos)
 940     ;;
 941   aarch64-*-darwin*)
 942     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 943     noconfigdirs="$noconfigdirs sim target-rda"
 944     ;;
 945   amdgcn*-*-*)
 946     ;;
 947   arm-*-darwin*)
 948     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 949     noconfigdirs="$noconfigdirs sim target-rda"
 950     ;;
 951   powerpc-*-darwin*)
 952     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 953     noconfigdirs="$noconfigdirs sim target-rda"
 954     ;;
 955   i[[3456789]]86-*-darwin*)
 956     noconfigdirs="$noconfigdirs ld gprof"
 957     noconfigdirs="$noconfigdirs sim target-rda"
 958     ;;
 959   x86_64-*-darwin[[912]]*)
 960     noconfigdirs="$noconfigdirs ld gas gprof"
 961     noconfigdirs="$noconfigdirs sim target-rda"
 962     ;;
 963   *-*-darwin*)
 964     noconfigdirs="$noconfigdirs ld gas gdb gprof"
 965     noconfigdirs="$noconfigdirs sim target-rda"
 966     ;;
 967   *-*-dragonfly*)
 968     ;;
 969   *-*-freebsd*)
 970     if test "x$with_gmp" = x && test "x$with_gmp_dir" = x \
 971         && test -f /usr/local/include/gmp.h; then
 972       with_gmp=/usr/local
 973     fi
 974     ;;
 975   *-*-kaos*)
 976     # Remove unsupported stuff on all kaOS configurations.
 977     noconfigdirs="$noconfigdirs target-libgloss"
 978     ;;
 979   *-*-netbsd*)
 980     ;;
 981   *-*-netware*)
 982     ;;
 983   *-*-phoenix*)
 984     noconfigdirs="$noconfigdirs target-libgloss"
 985     ;;
 986   *-*-rtems*)
 987     noconfigdirs="$noconfigdirs target-libgloss"
 988     ;;
 989     # The tpf target doesn't support gdb yet.
 990   *-*-tpf*)
 991     noconfigdirs="$noconfigdirs gdb tcl tk libgui itcl"
 992     ;;
 993   *-*-uclinux*)
 994     noconfigdirs="$noconfigdirs target-rda"
 995     ;;
 996   *-*-vxworks*)
 997     ;;
 998   alpha*-dec-osf*)
 999     # ld works, but does not support shared libraries.
1000     # gas doesn't generate exception information.
1001     noconfigdirs="$noconfigdirs gas ld"
1002     ;;
1003   alpha*-*-*vms*)
1004     noconfigdirs="$noconfigdirs gdb target-newlib target-libgloss"
1005     ;;
1006   alpha*-*-*)
1007     # newlib is not 64 bit ready
1008     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1009     ;;
1010   sh*-*-pe|mips*-*-pe|*arm-wince-pe)
1011     noconfigdirs="$noconfigdirs tcl tk itcl libgui sim"
1012     ;;
1013   arc*-*-*)
1014     noconfigdirs="$noconfigdirs sim"
1015     ;;
1016   arm-*-pe*)
1017     noconfigdirs="$noconfigdirs target-libgloss"
1018     ;;
1019   arm-*-riscix*)
1020     noconfigdirs="$noconfigdirs ld target-libgloss"
1021     ;;
1022   avr-*-*)
1023     if test x${with_avrlibc} != xno; then
1024       noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1025     fi
1026     ;;
1027   c4x-*-* | tic4x-*-*)
1028     noconfigdirs="$noconfigdirs target-libgloss"
1029     ;;
1030   tic54x-*-*)
1031     noconfigdirs="$noconfigdirs target-libgloss gdb"
1032     ;;
1033   d10v-*-*)
1034     noconfigdirs="$noconfigdirs target-libgloss"
1035     ;;
1036   d30v-*-*)
1037     noconfigdirs="$noconfigdirs gdb"
1038     ;;
1039   fr30-*-elf*)
1040     noconfigdirs="$noconfigdirs gdb"
1041     ;;
1042   ft32-*-*)
1043     noconfigdirs="$noconfigdirs target-rda gprof"
1044     ;;
1045   moxie-*-*)
1046     noconfigdirs="$noconfigdirs"
1047     ;;
1048   h8300*-*-*)
1049     noconfigdirs="$noconfigdirs target-libgloss"
1050     ;;
1051   h8500-*-*)
1052     noconfigdirs="$noconfigdirs target-libgloss"
1053     ;;
1054   hppa1.1-*-osf* | hppa1.1-*-bsd* )
1055     ;;
1056   hppa*64*-*-hpux*)
1057     noconfigdirs="$noconfigdirs gdb"
1058     ;;
1059   hppa*-*-hpux11*)
1060     noconfigdirs="$noconfigdirs gdb ld"
1061     ;;
1062   hppa*64*-*-linux*)
1063     ;;
1064   hppa*-*-linux*)
1065     ;;
1066   hppa*-*-*elf* | \
1067   hppa*-*-lites* | \
1068   hppa*-*-openbsd* | \
1069   hppa*64*-*-*)
1070     ;;
1071   hppa*-*-pro*)
1072     ;;
1073   hppa*-*-*)
1074     noconfigdirs="$noconfigdirs ld"
1075     ;;
1076   i960-*-*)
1077     noconfigdirs="$noconfigdirs gdb"
1078     ;;
1079   ia64*-*-elf*)
1080     # No gdb support yet.
1081     noconfigdirs="$noconfigdirs readline libgui itcl gdb"
1082     ;;
1083   ia64*-**-hpux*)
1084     # No ld support yet.
1085     noconfigdirs="$noconfigdirs gdb libgui itcl ld"
1086     ;;
1087   ia64*-*-*vms*)
1088     # No ld support yet.
1089     noconfigdirs="$noconfigdirs libgui itcl ld"
1090     ;;
1091   i[[3456789]]86-w64-mingw*)
1092     ;;
1093   i[[3456789]]86-*-mingw*)
1094     target_configdirs="$target_configdirs target-winsup"
1095     ;;
1096   *-*-cygwin*)
1097     target_configdirs="$target_configdirs target-libtermcap target-winsup"
1098     noconfigdirs="$noconfigdirs target-libgloss"
1099     # always build newlib if winsup directory is present.
1100     if test -d "$srcdir/winsup/cygwin"; then
1101       skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1102     elif test -d "$srcdir/newlib"; then
1103       echo "Warning: winsup/cygwin is missing so newlib can't be built."
1104     fi
1105     ;;
1106   i[[3456789]]86-*-pe)
1107     noconfigdirs="$noconfigdirs target-libgloss"
1108     ;;
1109   i[[3456789]]86-*-sco3.2v5*)
1110     # The linker does not yet know about weak symbols in COFF,
1111     # and is not configured to handle mixed ELF and COFF.
1112     noconfigdirs="$noconfigdirs ld target-libgloss"
1113     ;;
1114   i[[3456789]]86-*-sco*)
1115     noconfigdirs="$noconfigdirs gprof target-libgloss"
1116     ;;
1117   i[[3456789]]86-*-solaris2* | x86_64-*-solaris2.1[[0-9]]*)
1118     noconfigdirs="$noconfigdirs target-libgloss"
1119     ;;
1120   i[[3456789]]86-*-sysv4*)
1121     noconfigdirs="$noconfigdirs target-libgloss"
1122     ;;
1123   i[[3456789]]86-*-beos*)
1124     noconfigdirs="$noconfigdirs gdb"
1125     ;;
1126   i[[3456789]]86-*-rdos*)
1127     noconfigdirs="$noconfigdirs gdb"
1128     ;;
1129   mmix-*-*)
1130     noconfigdirs="$noconfigdirs gdb"
1131     ;;
1132   mt-*-*)
1133     noconfigdirs="$noconfigdirs sim"
1134     ;;
1135   nfp-*-*)
1136     noconfigdirs="$noconfigdirs ld gas gdb gprof sim"
1137     noconfigdirs="$noconfigdirs $target_libraries"
1138     ;;
1139   powerpc-*-aix*)
1140     # copied from rs6000-*-* entry
1141     noconfigdirs="$noconfigdirs gprof"
1142     ;;
1143   powerpc*-*-winnt* | powerpc*-*-pe*)
1144     target_configdirs="$target_configdirs target-winsup"
1145     noconfigdirs="$noconfigdirs gdb tcl tk target-libgloss itcl"
1146     # always build newlib.
1147     skipdirs=`echo " ${skipdirs} " | sed -e 's/ target-newlib / /'`
1148     ;;
1149     # This is temporary until we can link against shared libraries
1150   powerpcle-*-solaris*)
1151     noconfigdirs="$noconfigdirs gdb sim tcl tk itcl"
1152     ;;
1153   powerpc-*-beos*)
1154     noconfigdirs="$noconfigdirs gdb"
1155     ;;
1156   rs6000-*-lynxos*)
1157     noconfigdirs="$noconfigdirs gprof"
1158     ;;
1159   rs6000-*-aix*)
1160     noconfigdirs="$noconfigdirs gprof"
1161     ;;
1162   rs6000-*-*)
1163     noconfigdirs="$noconfigdirs gprof"
1164     ;;
1165   m68k-apollo-*)
1166     noconfigdirs="$noconfigdirs ld binutils gprof target-libgloss"
1167     ;;
1168   microblaze*)
1169     noconfigdirs="$noconfigdirs gprof"
1170     ;;
1171   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
1172     if test x$with_newlib = xyes; then
1173       noconfigdirs="$noconfigdirs gprof"
1174     fi
1175     ;;
1176   mips*-*-irix5*)
1177     noconfigdirs="$noconfigdirs gprof target-libgloss"
1178     ;;
1179   mips*-*-irix6*)
1180     noconfigdirs="$noconfigdirs gprof target-libgloss"
1181     ;;
1182   mips*-*-bsd*)
1183     noconfigdirs="$noconfigdirs ld gas gprof target-libgloss"
1184     ;;
1185   mips*-*-linux*)
1186     ;;
1187   mips*-*-ultrix* | mips*-*-osf* | mips*-*-ecoff* | mips*-*-pe* \
1188   | mips*-*-irix* | mips*-*-lnews* | mips*-*-riscos*)
1189     noconfigdirs="$noconfigdirs ld gas gprof"
1190     ;;
1191   mips*-*-*)
1192     noconfigdirs="$noconfigdirs gprof"
1193     ;;
1194   nvptx*-*-*)
1195     noconfigdirs="$noconfigdirs target-libssp target-libstdc++-v3 target-libobjc"
1196     ;;
1197   sh-*-*)
1198     case "${target}" in
1199       sh*-*-elf)
1200          ;;
1201       *)
1202          noconfigdirs="$noconfigdirs target-libgloss" ;;
1203     esac
1204     ;;
1205   sparc-*-sunos4*)
1206     if test x${is_cross_compiler} = xno ; then
1207            use_gnu_ld=no
1208     fi
1209     ;;
1210   tic6x-*-*)
1211     noconfigdirs="$noconfigdirs sim"
1212     ;;
1213   tilepro*-*-* | tilegx*-*-*)
1214     noconfigdirs="$noconfigdirs sim"
1215     ;;
1216   v810-*-*)
1217     noconfigdirs="$noconfigdirs bfd binutils gas gdb ld opcodes target-libgloss"
1218     ;;
1219   vax-*-*)
1220     noconfigdirs="$noconfigdirs target-newlib target-libgloss"
1221     ;;
1222   wasm32-*-*)
1223     noconfigdirs="$noconfigdirs ld"
1224     ;;
1225 esac
1226
1227 # If we aren't building newlib, then don't build libgloss, since libgloss
1228 # depends upon some newlib header files.
1229 case "${noconfigdirs}" in
1230   *target-libgloss*) ;;
1231   *target-newlib*) noconfigdirs="$noconfigdirs target-libgloss" ;;
1232 esac
1233
1234 # Work in distributions that contain no compiler tools, like Autoconf.
1235 host_makefile_frag=/dev/null
1236 if test -d ${srcdir}/config ; then
1237 case "${host}" in
1238   i[[3456789]]86-*-msdosdjgpp*)
1239     host_makefile_frag="config/mh-djgpp"
1240     ;;
1241   *-cygwin*)
1242     ACX_CHECK_CYGWIN_CAT_WORKS
1243     host_makefile_frag="config/mh-cygwin"
1244     ;;
1245   *-mingw*)
1246     host_makefile_frag="config/mh-mingw"
1247     ;;
1248   alpha*-linux*)
1249     host_makefile_frag="config/mh-alpha-linux"
1250     ;;
1251   hppa*-hp-hpux10*)
1252     host_makefile_frag="config/mh-pa-hpux10"
1253     ;;
1254   hppa*-hp-hpux*)
1255     host_makefile_frag="config/mh-pa"
1256     ;;
1257   hppa*-*)
1258     host_makefile_frag="config/mh-pa"
1259     ;;
1260   *-*-darwin*)
1261     host_makefile_frag="config/mh-darwin"
1262     ;;
1263   powerpc-*-aix*)
1264     host_makefile_frag="config/mh-ppc-aix"
1265     ;;
1266   rs6000-*-aix*)
1267     host_makefile_frag="config/mh-ppc-aix"
1268     ;;
1269 esac
1270 fi
1271
1272 if test "${build}" != "${host}" ; then
1273   AR_FOR_BUILD=${AR_FOR_BUILD-ar}
1274   AS_FOR_BUILD=${AS_FOR_BUILD-as}
1275   CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
1276   CXX_FOR_BUILD=${CXX_FOR_BUILD-g++}
1277   GFORTRAN_FOR_BUILD=${GFORTRAN_FOR_BUILD-gfortran}
1278   GOC_FOR_BUILD=${GOC_FOR_BUILD-gccgo}
1279   GDC_FOR_BUILD=${GDC_FOR_BUILD-gdc}
1280   DLLTOOL_FOR_BUILD=${DLLTOOL_FOR_BUILD-dlltool}
1281   LD_FOR_BUILD=${LD_FOR_BUILD-ld}
1282   NM_FOR_BUILD=${NM_FOR_BUILD-nm}
1283   RANLIB_FOR_BUILD=${RANLIB_FOR_BUILD-ranlib}
1284   WINDRES_FOR_BUILD=${WINDRES_FOR_BUILD-windres}
1285   WINDMC_FOR_BUILD=${WINDMC_FOR_BUILD-windmc}
1286 else
1287   AR_FOR_BUILD="\$(AR)"
1288   AS_FOR_BUILD="\$(AS)"
1289   CC_FOR_BUILD="\$(CC)"
1290   CXX_FOR_BUILD="\$(CXX)"
1291   GFORTRAN_FOR_BUILD="\$(GFORTRAN)"
1292   GOC_FOR_BUILD="\$(GOC)"
1293   GDC_FOR_BUILD="\$(GDC)"
1294   DLLTOOL_FOR_BUILD="\$(DLLTOOL)"
1295   LD_FOR_BUILD="\$(LD)"
1296   NM_FOR_BUILD="\$(NM)"
1297   RANLIB_FOR_BUILD="\$(RANLIB)"
1298   WINDRES_FOR_BUILD="\$(WINDRES)"
1299   WINDMC_FOR_BUILD="\$(WINDMC)"
1300 fi
1301
1302 AC_PROG_CC
1303 AC_PROG_CXX
1304
1305 # We must set the default linker to the linker used by gcc for the correct
1306 # operation of libtool.  If LD is not defined and we are using gcc, try to
1307 # set the LD default to the ld used by gcc.
1308 if test -z "$LD"; then
1309   if test "$GCC" = yes; then
1310     case $build in
1311     *-*-mingw*)
1312       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1 | tr -d '\015'` ;;
1313     *)
1314       gcc_prog_ld=`$CC -print-prog-name=ld 2>&1` ;;
1315     esac
1316     case $gcc_prog_ld in
1317     # Accept absolute paths.
1318     [[\\/]* | [A-Za-z]:[\\/]*)]
1319       LD="$gcc_prog_ld" ;;
1320     esac
1321   fi
1322 fi
1323
1324 # Check whether -static-libstdc++ -static-libgcc is supported.
1325 have_static_libs=no
1326 if test "$GCC" = yes; then
1327   saved_LDFLAGS="$LDFLAGS"
1328
1329   LDFLAGS="$LDFLAGS -static-libstdc++ -static-libgcc"
1330   AC_MSG_CHECKING([whether g++ accepts -static-libstdc++ -static-libgcc])
1331   AC_LANG_PUSH(C++)
1332   AC_LINK_IFELSE([AC_LANG_SOURCE([
1333 #if (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 5)
1334 #error -static-libstdc++ not implemented
1335 #endif
1336 int main() {}])],
1337     [AC_MSG_RESULT([yes]); have_static_libs=yes],
1338     [AC_MSG_RESULT([no])])
1339   AC_LANG_POP(C++)
1340
1341   LDFLAGS="$saved_LDFLAGS"
1342 fi
1343
1344 ACX_PROG_GNAT
1345 ACX_PROG_CMP_IGNORE_INITIAL
1346
1347 AC_ARG_ENABLE([bootstrap],
1348 [AS_HELP_STRING([--enable-bootstrap],
1349                 [enable bootstrapping @<:@yes if native build@:>@])],,
1350 enable_bootstrap=default)
1351
1352 # Issue errors and warnings for invalid/strange bootstrap combinations.
1353 if test -r $srcdir/gcc/configure; then
1354   have_compiler=yes
1355 else
1356   have_compiler=no
1357 fi
1358
1359 case "$have_compiler:$host:$target:$enable_bootstrap" in
1360   *:*:*:no) ;;
1361
1362   # Default behavior.  Enable bootstrap if we have a compiler
1363   # and we are in a native configuration.
1364   yes:$build:$build:default)
1365     enable_bootstrap=yes ;;
1366
1367   *:*:*:default)
1368     enable_bootstrap=no ;;
1369
1370   # We have a compiler and we are in a native configuration, bootstrap is ok
1371   yes:$build:$build:yes)
1372     ;;
1373
1374   # Other configurations, but we have a compiler.  Assume the user knows
1375   # what he's doing.
1376   yes:*:*:yes)
1377     AC_MSG_WARN([trying to bootstrap a cross compiler])
1378     ;;
1379
1380   # No compiler: if they passed --enable-bootstrap explicitly, fail
1381   no:*:*:yes)
1382     AC_MSG_ERROR([cannot bootstrap without a compiler]) ;;
1383
1384   # Fail if wrong command line
1385   *)
1386     AC_MSG_ERROR([invalid option for --enable-bootstrap])
1387     ;;
1388 esac
1389
1390 # When bootstrapping with GCC, build stage 1 in C++98 mode to ensure that a
1391 # C++98 compiler can still start the bootstrap.
1392 if test "$enable_bootstrap:$GXX" = "yes:yes"; then
1393   CXX="$CXX -std=gnu++98"
1394 fi
1395
1396 # Used for setting $lt_cv_objdir
1397 _LT_CHECK_OBJDIR
1398
1399 # Check for GMP, MPFR and MPC
1400 gmplibs="-lmpc -lmpfr -lgmp"
1401 gmpinc=
1402 have_gmp=no
1403
1404 # Specify a location for mpc
1405 # check for this first so it ends up on the link line before mpfr.
1406 AC_ARG_WITH(mpc,
1407 [AS_HELP_STRING([--with-mpc=PATH],
1408                 [specify prefix directory for installed MPC package.
1409                  Equivalent to --with-mpc-include=PATH/include
1410                  plus --with-mpc-lib=PATH/lib])])
1411 AC_ARG_WITH(mpc-include,
1412 [AS_HELP_STRING([--with-mpc-include=PATH],
1413                 [specify directory for installed MPC include files])])
1414 AC_ARG_WITH(mpc-lib,
1415 [AS_HELP_STRING([--with-mpc-lib=PATH],
1416                 [specify directory for the installed MPC library])])
1417
1418 if test "x$with_mpc" != x; then
1419   gmplibs="-L$with_mpc/lib $gmplibs"
1420   gmpinc="-I$with_mpc/include $gmpinc"
1421 fi
1422 if test "x$with_mpc_include" != x; then
1423   gmpinc="-I$with_mpc_include $gmpinc"
1424 fi
1425 if test "x$with_mpc_lib" != x; then
1426   gmplibs="-L$with_mpc_lib $gmplibs"
1427 fi
1428 if test "x$with_mpc$with_mpc_include$with_mpc_lib" = x && test -d ${srcdir}/mpc; then
1429   gmplibs='-L$$r/$(HOST_SUBDIR)/mpc/src/'"$lt_cv_objdir $gmplibs"
1430   gmpinc='-I$$s/mpc/src '"$gmpinc"
1431   # Do not test the mpc version.  Assume that it is sufficient, since
1432   # it is in the source tree, and the library has not been built yet
1433   # but it would be included on the link line in the version check below
1434   # hence making the test fail.
1435   have_gmp=yes
1436 fi
1437
1438 # Specify a location for mpfr
1439 # check for this first so it ends up on the link line before gmp.
1440 AC_ARG_WITH(mpfr-dir,
1441 [AS_HELP_STRING([--with-mpfr-dir=PATH], [this option has been REMOVED])],
1442 [AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
1443 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH])])
1444
1445 AC_ARG_WITH(mpfr,
1446 [AS_HELP_STRING([--with-mpfr=PATH],
1447                 [specify prefix directory for installed MPFR package.
1448                  Equivalent to --with-mpfr-include=PATH/include
1449                  plus --with-mpfr-lib=PATH/lib])])
1450 AC_ARG_WITH(mpfr-include,
1451 [AS_HELP_STRING([--with-mpfr-include=PATH],
1452                 [specify directory for installed MPFR include files])])
1453 AC_ARG_WITH(mpfr-lib,
1454 [AS_HELP_STRING([--with-mpfr-lib=PATH],
1455                 [specify directory for the installed MPFR library])])
1456
1457 if test "x$with_mpfr" != x; then
1458   gmplibs="-L$with_mpfr/lib $gmplibs"
1459   gmpinc="-I$with_mpfr/include $gmpinc"
1460 fi
1461 if test "x$with_mpfr_include" != x; then
1462   gmpinc="-I$with_mpfr_include $gmpinc"
1463 fi
1464 if test "x$with_mpfr_lib" != x; then
1465   gmplibs="-L$with_mpfr_lib $gmplibs"
1466 fi
1467 if test "x$with_mpfr$with_mpfr_include$with_mpfr_lib" = x && test -d ${srcdir}/mpfr; then
1468   # MPFR v3.1.0 moved the sources into a src sub-directory.
1469   if ! test -d ${srcdir}/mpfr/src; then
1470     AC_MSG_ERROR([dnl
1471 Building GCC with MPFR in the source tree is only handled for MPFR 3.1.0+.])
1472   fi
1473   gmplibs='-L$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir $gmplibs"
1474   gmpinc='-I$$r/$(HOST_SUBDIR)/mpfr/src -I$$s/mpfr/src '"$gmpinc"
1475   extra_mpc_mpfr_configure_flags='--with-mpfr-include=$$s/mpfr/src --with-mpfr-lib=$$r/$(HOST_SUBDIR)/mpfr/src/'"$lt_cv_objdir"
1476   # Do not test the mpfr version.  Assume that it is sufficient, since
1477   # it is in the source tree, and the library has not been built yet
1478   # but it would be included on the link line in the version check below
1479   # hence making the test fail.
1480   have_gmp=yes
1481 fi
1482
1483 # Specify a location for gmp
1484 AC_ARG_WITH(gmp-dir,
1485 [AS_HELP_STRING([--with-gmp-dir=PATH], [this option has been REMOVED])],
1486 [AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
1487 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH])])
1488
1489 AC_ARG_WITH(gmp,
1490 [AS_HELP_STRING([--with-gmp=PATH],
1491                 [specify prefix directory for the installed GMP package.
1492                  Equivalent to --with-gmp-include=PATH/include
1493                  plus --with-gmp-lib=PATH/lib])])
1494 AC_ARG_WITH(gmp-include,
1495 [AS_HELP_STRING([--with-gmp-include=PATH],
1496                 [specify directory for installed GMP include files])])
1497 AC_ARG_WITH(gmp-lib,
1498 [AS_HELP_STRING([--with-gmp-lib=PATH],
1499                 [specify directory for the installed GMP library])])
1500
1501
1502 if test "x$with_gmp" != x; then
1503   gmplibs="-L$with_gmp/lib $gmplibs"
1504   gmpinc="-I$with_gmp/include $gmpinc"
1505 fi
1506 if test "x$with_gmp_include" != x; then
1507   gmpinc="-I$with_gmp_include $gmpinc"
1508 fi
1509 if test "x$with_gmp_lib" != x; then
1510   gmplibs="-L$with_gmp_lib $gmplibs"
1511 fi
1512 if test "x$with_gmp$with_gmp_include$with_gmp_lib" = x && test -d ${srcdir}/gmp; then
1513   gmplibs='-L$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir $gmplibs"
1514   gmpinc='-I$$r/$(HOST_SUBDIR)/gmp -I$$s/gmp '"$gmpinc"
1515   extra_mpfr_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1516   extra_mpc_gmp_configure_flags='--with-gmp-include=$$r/$(HOST_SUBDIR)/gmp --with-gmp-lib=$$r/$(HOST_SUBDIR)/gmp/'"$lt_cv_objdir"
1517   extra_isl_gmp_configure_flags='--with-gmp-builddir=$$r/$(HOST_SUBDIR)/gmp'
1518   # Do not test the gmp version.  Assume that it is sufficient, since
1519   # it is in the source tree, and the library has not been built yet
1520   # but it would be included on the link line in the version check below
1521   # hence making the test fail.
1522   have_gmp=yes
1523 fi
1524
1525 if test -d ${srcdir}/gcc && test "x$have_gmp" = xno; then
1526   have_gmp=yes
1527   saved_CFLAGS="$CFLAGS"
1528   CFLAGS="$CFLAGS $gmpinc"
1529   # Check for the recommended and required versions of GMP.
1530   AC_MSG_CHECKING([for the correct version of gmp.h])
1531   AC_TRY_COMPILE([#include "gmp.h"],[
1532   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1533   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1534   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,2,3)
1535   choke me
1536   #endif
1537   ], [AC_TRY_COMPILE([#include <gmp.h>],[
1538   #define GCC_GMP_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
1539   #define GCC_GMP_VERSION GCC_GMP_VERSION_NUM(__GNU_MP_VERSION,__GNU_MP_VERSION_MINOR,__GNU_MP_VERSION_PATCHLEVEL)
1540   #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,2)
1541   choke me
1542   #endif
1543   ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1544    [AC_MSG_RESULT([no]); have_gmp=no])
1545
1546   # If we have GMP, check the MPFR version.
1547   if test x"$have_gmp" = xyes; then
1548     # Check for the recommended and required versions of MPFR.
1549     AC_MSG_CHECKING([for the correct version of mpfr.h])
1550     AC_TRY_COMPILE([#include <gmp.h>
1551     #include <mpfr.h>],[
1552     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,0)
1553     choke me
1554     #endif
1555     ], [AC_TRY_COMPILE([#include <gmp.h>
1556     #include <mpfr.h>],[
1557     #if MPFR_VERSION < MPFR_VERSION_NUM(2,4,2)
1558     choke me
1559     #endif
1560     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1561      [AC_MSG_RESULT([no]); have_gmp=no])
1562   fi
1563
1564   # Check for the MPC header version.
1565   if test x"$have_gmp" = xyes ; then
1566     # Check for the recommended and required versions of MPC.
1567     AC_MSG_CHECKING([for the correct version of mpc.h])
1568     AC_TRY_COMPILE([#include <mpc.h>],[
1569     #if MPC_VERSION < MPC_VERSION_NUM(0,8,0)
1570     choke me
1571     #endif
1572     ], [AC_TRY_COMPILE([#include <mpc.h>],[
1573     #if MPC_VERSION < MPC_VERSION_NUM(0,8,1)
1574     choke me
1575     #endif
1576     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([buggy but acceptable])])],
1577      [AC_MSG_RESULT([no]); have_gmp=no])
1578   fi
1579
1580   # Now check the MPFR library.
1581   if test x"$have_gmp" = xyes; then
1582     saved_LIBS="$LIBS"
1583     LIBS="$LIBS $gmplibs"
1584     AC_MSG_CHECKING([for the correct version of the gmp/mpfr/mpc libraries])
1585     AC_TRY_LINK([#include <mpc.h>],[
1586     mpfr_t n;
1587     mpfr_t x;
1588     mpc_t c;
1589     int t;
1590     mpfr_init (n);
1591     mpfr_init (x);
1592     mpfr_atan2 (n, n, x, GMP_RNDN);
1593     mpfr_erfc (n, x, GMP_RNDN);
1594     mpfr_subnormalize (x, t, GMP_RNDN);
1595     mpfr_clear(n);
1596     mpfr_clear(x);
1597     mpc_init2 (c, 53);
1598     mpc_set_ui_ui (c, 1, 1, MPC_RNDNN);
1599     mpc_cosh (c, c, MPC_RNDNN);
1600     mpc_pow (c, c, c, MPC_RNDNN);
1601     mpc_acosh (c, c, MPC_RNDNN);
1602     mpc_clear (c);
1603     ], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]); have_gmp=no])
1604     LIBS="$saved_LIBS"
1605   fi
1606
1607   CFLAGS="$saved_CFLAGS"
1608
1609 # The library versions listed in the error message below should match
1610 # the HARD-minimums enforced above.
1611   if test x$have_gmp != xyes; then
1612     AC_MSG_ERROR([Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
1613 Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
1614 their locations.  Source code for these libraries can be found at
1615 their respective hosting sites as well as at
1616 ftp://gcc.gnu.org/pub/gcc/infrastructure/.  See also
1617 http://gcc.gnu.org/install/prerequisites.html for additional info.  If
1618 you obtained GMP, MPFR and/or MPC from a vendor distribution package,
1619 make sure that you have installed both the libraries and the header
1620 files.  They may be located in separate packages.])
1621   fi
1622 fi
1623
1624 # Flags needed for both GMP, MPFR and/or MPC.
1625 AC_SUBST(gmplibs)
1626 AC_SUBST(gmpinc)
1627 AC_SUBST(extra_mpfr_configure_flags)
1628 AC_SUBST(extra_mpc_gmp_configure_flags)
1629 AC_SUBST(extra_mpc_mpfr_configure_flags)
1630 AC_SUBST(extra_isl_gmp_configure_flags)
1631
1632 # Libraries to use for stage1 or when not bootstrapping.
1633 AC_ARG_WITH(stage1-libs,
1634 [AS_HELP_STRING([--with-stage1-libs=LIBS], [libraries for stage1])],
1635 [if test "$withval" = "no" -o "$withval" = "yes"; then
1636    stage1_libs=
1637  else
1638    stage1_libs=$withval
1639  fi],
1640 [stage1_libs=])
1641 AC_SUBST(stage1_libs)
1642
1643 # Linker flags to use for stage1 or when not bootstrapping.
1644 AC_ARG_WITH(stage1-ldflags,
1645 [AS_HELP_STRING([--with-stage1-ldflags=FLAGS], [linker flags for stage1])],
1646 [if test "$withval" = "no" -o "$withval" = "yes"; then
1647    stage1_ldflags=
1648  else
1649    stage1_ldflags=$withval
1650  fi],
1651 [stage1_ldflags=
1652  # In stage 1, default to linking libstdc++ and libgcc statically with GCC
1653  # if supported.  But if the user explicitly specified the libraries to use,
1654  # trust that they are doing what they want.
1655  if test "$stage1_libs" = "" -a "$have_static_libs" = yes; then
1656    stage1_ldflags="-static-libstdc++ -static-libgcc"
1657  fi])
1658 AC_SUBST(stage1_ldflags)
1659
1660 # Libraries to use for stage2 and later builds.
1661 AC_ARG_WITH(boot-libs,
1662 [AS_HELP_STRING([--with-boot-libs=LIBS], [libraries for stage2 and later])],
1663 [if test "$withval" = "no" -o "$withval" = "yes"; then
1664    poststage1_libs=
1665  else
1666    poststage1_libs=$withval
1667  fi],
1668 [poststage1_libs=])
1669 AC_SUBST(poststage1_libs)
1670
1671 # Linker flags to use for stage2 and later builds.
1672 AC_ARG_WITH(boot-ldflags,
1673 [AS_HELP_STRING([--with-boot-ldflags=FLAGS],
1674                 [linker flags for stage2 and later])],
1675 [if test "$withval" = "no" -o "$withval" = "yes"; then
1676    poststage1_ldflags=
1677  else
1678    poststage1_ldflags=$withval
1679  fi],
1680 [poststage1_ldflags=
1681  # In stages 2 and 3, default to linking libstdc++ and libgcc
1682  # statically.  But if the user explicitly specified the libraries to
1683  # use, trust that they are doing what they want.
1684  if test "$poststage1_libs" = ""; then
1685    poststage1_ldflags="-static-libstdc++ -static-libgcc"
1686  fi])
1687 AC_SUBST(poststage1_ldflags)
1688
1689 # GCC GRAPHITE dependency isl.
1690 # Basic setup is inlined here, actual checks are in config/isl.m4
1691
1692 AC_ARG_WITH(isl,
1693   [AS_HELP_STRING(
1694    [--with-isl=PATH],
1695    [Specify prefix directory for the installed isl package.
1696     Equivalent to --with-isl-include=PATH/include
1697     plus --with-isl-lib=PATH/lib])])
1698
1699 # Treat --without-isl as a request to disable
1700 # GRAPHITE support and skip all following checks.
1701 if test "x$with_isl" != "xno"; then
1702   # Check for isl
1703   dnl Provide configure switches and initialize islinc & isllibs
1704   dnl with user input.
1705   ISL_INIT_FLAGS
1706   dnl The versions of isl that work for Graphite
1707   ISL_CHECK_VERSION()
1708   dnl Only execute fail-action, if isl has been requested.
1709   ISL_IF_FAILED([
1710     AC_MSG_ERROR([Unable to find a usable isl.  See config.log for details.])])
1711 fi
1712
1713 # If the isl check failed, disable builds of in-tree variant of isl
1714 if test "x$with_isl" = xno ||
1715    test "x$gcc_cv_isl" = xno; then
1716   noconfigdirs="$noconfigdirs isl"
1717   islinc=
1718 fi
1719
1720 AC_SUBST(isllibs)
1721 AC_SUBST(islinc)
1722
1723 # Check for LTO support.
1724 AC_ARG_ENABLE(lto,
1725 [AS_HELP_STRING([--enable-lto], [enable link time optimization support])],
1726 enable_lto=$enableval,
1727 enable_lto=yes; default_enable_lto=yes)
1728
1729 ACX_ELF_TARGET_IFELSE([# ELF platforms build the lto-plugin always.
1730   build_lto_plugin=yes
1731 ],[if test x"$default_enable_lto" = x"yes" ; then
1732     case $target in
1733       *-apple-darwin[[912]]* | *-cygwin* | *-mingw* | *djgpp*) ;;
1734       # On other non-ELF platforms, LTO has yet to be validated.
1735       *) enable_lto=no ;;
1736     esac
1737   else
1738   # Apart from ELF platforms, only Windows and Darwin support LTO so far.
1739   # It would also be nice to check the binutils support, but we don't
1740   # have gcc_GAS_CHECK_FEATURE available here.  For now, we'll just
1741   # warn during gcc/ subconfigure; unless you're bootstrapping with
1742   # -flto it won't be needed until after installation anyway.
1743     case $target in
1744       *-cygwin* | *-mingw* | *-apple-darwin* | *djgpp*) ;;
1745       *) if test x"$enable_lto" = x"yes"; then
1746         AC_MSG_ERROR([LTO support is not enabled for this target.])
1747         fi
1748       ;;
1749     esac
1750   fi
1751   # Among non-ELF, only Windows platforms support the lto-plugin so far.
1752   # Build it unless LTO was explicitly disabled.
1753   case $target in
1754     *-cygwin* | *-mingw*) build_lto_plugin=$enable_lto ;;
1755     *) ;;
1756   esac
1757 ])
1758
1759 AC_ARG_ENABLE(linker-plugin-configure-flags,
1760   [AS_HELP_STRING([[--enable-linker-plugin-configure-flags=FLAGS]],
1761     [additional flags for configuring linker plugins @<:@none@:>@])],
1762   extra_linker_plugin_configure_flags=$enableval,
1763   extra_linker_plugin_configure_flags=)
1764 AC_SUBST(extra_linker_plugin_configure_flags)
1765 AC_ARG_ENABLE(linker-plugin-flags,
1766   [AS_HELP_STRING([[--enable-linker-plugin-flags=FLAGS]],
1767     [additional flags for configuring and building linker plugins @<:@none@:>@])],
1768   extra_linker_plugin_flags=$enableval,
1769   extra_linker_plugin_flags=)
1770 AC_SUBST(extra_linker_plugin_flags)
1771
1772 # Enable --enable-host-shared.
1773 # Checked early to determine whether jit is an 'all' language
1774 AC_ARG_ENABLE(host-shared,
1775 [AS_HELP_STRING([--enable-host-shared],
1776                 [build host code as shared libraries])],
1777 [host_shared=$enableval], [host_shared=no])
1778 AC_SUBST(host_shared)
1779
1780 # By default, C and C++ are the only stage 1 languages.
1781 stage1_languages=,c,
1782
1783 # Target libraries that we bootstrap.
1784 bootstrap_target_libs=,target-libgcc,
1785
1786 # Figure out what language subdirectories are present.
1787 # Look if the user specified --enable-languages="..."; if not, use
1788 # the environment variable $LANGUAGES if defined. $LANGUAGES might
1789 # go away some day.
1790 # NB:  embedded tabs in this IF block -- do not untabify
1791 if test -d ${srcdir}/gcc; then
1792   if test x"${enable_languages+set}" != xset; then
1793     if test x"${LANGUAGES+set}" = xset; then
1794       enable_languages="${LANGUAGES}"
1795         echo configure.ac: warning: setting LANGUAGES is deprecated, use --enable-languages instead 1>&2
1796     else
1797       enable_languages=default
1798     fi
1799   else
1800     if test x"${enable_languages}" = x ||
1801        test x"${enable_languages}" = xyes;
1802        then
1803       echo configure.ac: --enable-languages needs at least one language argument 1>&2
1804       exit 1
1805     fi
1806   fi
1807   enable_languages=`echo "${enable_languages}" | sed -e 's/[[   ,]][[   ,]]*/,/g' -e 's/,$//'`
1808
1809   # 'f95' is the old name for the 'fortran' language. We issue a warning
1810   # and make the substitution.
1811   case ,${enable_languages}, in
1812     *,f95,*)
1813       echo configure.ac: warning: 'f95' as language name is deprecated, use 'fortran' instead 1>&2
1814       enable_languages=`echo "${enable_languages}" | sed -e 's/f95/fortran/g'`
1815       ;;
1816   esac
1817
1818   # If bootstrapping, C++ must be enabled.
1819   case ",$enable_languages,:$enable_bootstrap" in
1820     *,c++,*:*) ;;
1821     *:yes)
1822       if test -f ${srcdir}/gcc/cp/config-lang.in; then
1823         enable_languages="${enable_languages},c++"
1824       else
1825         AC_MSG_ERROR([bootstrapping requires c++ sources])
1826       fi
1827       ;;
1828   esac
1829
1830   # First scan to see if an enabled language requires some other language.
1831   # We assume that a given config-lang.in will list all the language
1832   # front ends it requires, even if some are required indirectly.
1833   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1834     case ${lang_frag} in
1835       ..) ;;
1836       # The odd quoting in the next line works around
1837       # an apparent bug in bash 1.12 on linux.
1838       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1839       *)
1840         # From the config-lang.in, get $language, $lang_requires, and
1841         # $lang_requires_boot_languages.
1842         language=
1843         lang_requires=
1844         lang_requires_boot_languages=
1845         # set srcdir during sourcing lang_frag to the gcc dir.
1846         # Sadly overriding srcdir on the . line doesn't work in plain sh as it
1847         # polutes this shell
1848         saved_srcdir=${srcdir}
1849         srcdir=${srcdir}/gcc . ${lang_frag}
1850         srcdir=${saved_srcdir}
1851         for other in ${lang_requires} ${lang_requires_boot_languages}; do
1852           case ,${enable_languages}, in
1853             *,$other,*) ;;
1854             *,default,*) ;;
1855             *,all,*) ;;
1856             *,$language,*)
1857               echo " \`$other' language required by \`$language'; enabling" 1>&2
1858               enable_languages="${enable_languages},${other}"
1859               ;;
1860           esac
1861         done
1862         for other in ${lang_requires_boot_languages} ; do
1863           if test "$other" != "c"; then
1864             case ,${enable_stage1_languages}, in
1865               *,$other,*) ;;
1866               *,default,*) ;;
1867               *,all,*) ;;
1868               *)
1869                 case ,${enable_languages}, in
1870                   *,$language,*)
1871                     echo " '$other' language required by '$language' in stage 1; enabling" 1>&2
1872                     enable_stage1_languages="$enable_stage1_languages,${other}"
1873                     ;;
1874                 esac
1875                 ;;
1876             esac
1877           fi
1878         done
1879         ;;
1880     esac
1881   done
1882
1883   new_enable_languages=,c,
1884
1885   # If LTO is enabled, add the LTO front end.
1886   if test "$enable_lto" = "yes" ; then
1887     case ,${enable_languages}, in
1888       *,lto,*) ;;
1889       *) enable_languages="${enable_languages},lto" ;;
1890     esac
1891     if test "${build_lto_plugin}" = "yes" ; then
1892       configdirs="$configdirs lto-plugin"
1893     fi
1894   fi
1895
1896   # If we're building an offloading compiler, add the LTO front end.
1897   if test x"$enable_as_accelerator_for" != x ; then
1898     case ,${enable_languages}, in
1899       *,lto,*) ;;
1900       *) enable_languages="${enable_languages},lto" ;;
1901     esac
1902   fi
1903
1904   missing_languages=`echo ",$enable_languages," | sed -e s/,default,/,/ -e s/,all,/,/ -e s/,c,/,/ `
1905   potential_languages=,c,
1906
1907   enabled_target_libs=
1908   disabled_target_libs=
1909
1910   for lang_frag in ${srcdir}/gcc/*/config-lang.in .. ; do
1911     case ${lang_frag} in
1912       ..) ;;
1913       # The odd quoting in the next line works around
1914       # an apparent bug in bash 1.12 on linux.
1915       ${srcdir}/gcc/[[*]]/config-lang.in) ;;
1916       *)
1917         # From the config-lang.in, get $language, $target_libs,
1918         # $lang_dirs, $boot_language, and $build_by_default
1919         language=
1920         target_libs=
1921         lang_dirs=
1922         subdir_requires=
1923         boot_language=no
1924         build_by_default=yes
1925         # set srcdir during sourcing.  See above about save & restore
1926         saved_srcdir=${srcdir}
1927         srcdir=${srcdir}/gcc . ${lang_frag}
1928         srcdir=${saved_srcdir}
1929         if test x${language} = x; then
1930           echo "${lang_frag} doesn't set \$language." 1>&2
1931           exit 1
1932         fi
1933
1934         if test "$language" = "c++"; then
1935           boot_language=yes
1936         fi
1937
1938         add_this_lang=no
1939         # C is always enabled, so no need to add it again
1940         if test "$language" != "c"; then
1941           case ,${enable_languages}, in
1942             *,${language},*)
1943               # Language was explicitly selected; include it
1944               add_this_lang=yes
1945               ;;
1946             *,all,*)
1947               # All languages are enabled
1948               add_this_lang=all
1949               ;;
1950             *,default,*)
1951               # 'default' was selected, select it if it is a default language
1952               add_this_lang=${build_by_default}
1953               ;;
1954           esac
1955         fi
1956
1957         # Disable languages that need other directories if these aren't available.
1958         for i in $subdir_requires; do
1959           test -f "$srcdir/gcc/$i/config-lang.in" && continue
1960           case ${add_this_lang} in
1961             yes)
1962               # Specifically requested language; tell them.
1963               AC_MSG_ERROR([The gcc/$i directory contains parts of $language but is missing])
1964               ;;
1965             all)
1966               AC_MSG_WARN([The gcc/$i directory contains parts of $language but is missing])
1967               add_this_lang=unsupported
1968               ;;
1969             *)
1970               # Silently disable.
1971               add_this_lang=unsupported
1972               ;;
1973           esac
1974         done
1975
1976         # Disable Ada if no preexisting GNAT is available.
1977         case ${add_this_lang}:${language}:${have_gnat} in
1978           yes:ada:no)
1979             # Specifically requested language; tell them.
1980             AC_MSG_ERROR([GNAT is required to build $language])
1981             ;;
1982           all:ada:no)
1983             AC_MSG_WARN([GNAT is required to build $language])
1984             add_this_lang=unsupported
1985             ;;
1986           *:ada:no)
1987             # Silently disable.
1988             add_this_lang=unsupported
1989             ;;
1990         esac
1991
1992         # Disable jit if -enable-host-shared not specified
1993         case ${add_this_lang}:${language}:${host_shared} in
1994           yes:jit:no)
1995             # PR jit/64780: explicitly specify --enable-host-shared
1996             AC_MSG_ERROR([
1997 Enabling language "jit" requires --enable-host-shared.
1998
1999 --enable-host-shared typically slows the rest of the compiler down by
2000 a few %, so you must explicitly enable it.
2001
2002 If you want to build both the jit and the regular compiler, it is often
2003 best to do this via two separate configure/builds, in separate
2004 directories, to avoid imposing the performance cost of
2005 --enable-host-shared on the regular compiler.])
2006             ;;
2007           all:jit:no)
2008             AC_MSG_WARN([--enable-host-shared required to build $language])
2009             add_this_lang=unsupported
2010             ;;
2011           *:jit:no)
2012             # Silently disable.
2013             add_this_lang=unsupported
2014             ;;
2015         esac
2016
2017         # Disable a language that is unsupported by the target.
2018         case "${add_this_lang}: $unsupported_languages " in
2019           no:*) ;;
2020           unsupported:*) ;;
2021           *:*" $language "*)
2022             AC_MSG_WARN([${language} not supported for this target])
2023             add_this_lang=unsupported
2024             ;;
2025         esac
2026
2027         case $add_this_lang in
2028           unsupported)
2029             # Remove language-dependent dirs.
2030             disabled_target_libs="$disabled_target_libs $target_libs"
2031             noconfigdirs="$noconfigdirs $lang_dirs"
2032             ;;
2033           no)
2034             # Remove language-dependent dirs; still show language as supported.
2035             disabled_target_libs="$disabled_target_libs $target_libs"
2036             noconfigdirs="$noconfigdirs $lang_dirs"
2037             potential_languages="${potential_languages}${language},"
2038             ;;
2039           all|yes)
2040             new_enable_languages="${new_enable_languages}${language},"
2041             potential_languages="${potential_languages}${language},"
2042             missing_languages=`echo "$missing_languages" | sed "s/,$language,/,/"`
2043             enabled_target_libs="$enabled_target_libs $target_libs"
2044             case "${boot_language}:,$enable_stage1_languages," in
2045               yes:* | *:*,$language,* | *:*,yes, | *:*,all,)
2046                 # Add to (comma-separated) list of stage 1 languages.
2047                 case ",$stage1_languages," in
2048                   *,$language,* | ,yes, | ,all,) ;;
2049                   *) stage1_languages="${stage1_languages}${language}," ;;
2050                 esac
2051                 # We need to bootstrap any supporting libraries.
2052                 bootstrap_target_libs="${bootstrap_target_libs}${target_libs},"
2053                 ;;
2054             esac
2055             ;;
2056         esac
2057         ;;
2058     esac
2059   done
2060
2061   # Add target libraries which are only needed for disabled languages
2062   # to noconfigdirs.
2063   if test -n "$disabled_target_libs"; then
2064     for dir in $disabled_target_libs; do
2065       case " $enabled_target_libs " in
2066       *" ${dir} "*) ;;
2067       *) noconfigdirs="$noconfigdirs $dir" ;;
2068       esac
2069     done
2070   fi
2071
2072   AC_ARG_ENABLE(stage1-languages,
2073   [AS_HELP_STRING([[--enable-stage1-languages[=all]]],
2074                   [choose additional languages to build during
2075                   stage1.  Mostly useful for compiler development])],
2076   [case ,${enable_stage1_languages}, in
2077     ,no,|,,)
2078       # Set it to something that will have no effect in the loop below
2079       enable_stage1_languages=c ;;
2080     ,yes,)
2081       enable_stage1_languages=`echo $new_enable_languages | \
2082         sed -e "s/^,//" -e "s/,$//" ` ;;
2083     *,all,*)
2084       enable_stage1_languages=`echo ,$enable_stage1_languages, | \
2085         sed -e "s/,all,/$new_enable_languages/" -e "s/^,//" -e "s/,$//" ` ;;
2086   esac
2087
2088   # Add "good" languages from enable_stage1_languages to stage1_languages,
2089   # while "bad" languages go in missing_languages.  Leave no duplicates.
2090   for i in `echo $enable_stage1_languages | sed 's/,/ /g' `; do
2091     case $potential_languages in
2092       *,$i,*)
2093         case $stage1_languages in
2094           *,$i,*) ;;
2095           *) stage1_languages="$stage1_languages$i," ;;
2096         esac ;;
2097       *)
2098         case $missing_languages in
2099           *,$i,*) ;;
2100           *) missing_languages="$missing_languages$i," ;;
2101         esac ;;
2102      esac
2103   done])
2104
2105   # Remove leading/trailing commas that were added for simplicity
2106   potential_languages=`echo "$potential_languages" | sed -e "s/^,//" -e "s/,$//"`
2107   missing_languages=`echo "$missing_languages" | sed -e "s/^,//" -e "s/,$//"`
2108   stage1_languages=`echo "$stage1_languages" | sed -e "s/^,//" -e "s/,$//"`
2109   new_enable_languages=`echo "$new_enable_languages" | sed -e "s/^,//" -e "s/,$//"`
2110
2111   if test "x$missing_languages" != x; then
2112     AC_MSG_ERROR([
2113 The following requested languages could not be built: ${missing_languages}
2114 Supported languages are: ${potential_languages}])
2115   fi
2116   if test "x$new_enable_languages" != "x$enable_languages"; then
2117     echo The following languages will be built: ${new_enable_languages}
2118     enable_languages="$new_enable_languages"
2119   fi
2120
2121   AC_SUBST(stage1_languages)
2122   ac_configure_args=`echo " $ac_configure_args" | sed -e "s/ '--enable-languages=[[^ ]]*'//g" -e "s/$/ '--enable-languages="$enable_languages"'/" `
2123 fi
2124
2125 # Handle --disable-<component> generically.
2126 for dir in $configdirs $build_configdirs $target_configdirs ; do
2127   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g -e s/-/_/g`
2128   varname=`echo $dirname | sed -e s/+/_/g`
2129   if eval test x\${enable_${varname}} "=" xno ; then
2130     noconfigdirs="$noconfigdirs $dir"
2131   fi
2132 done
2133
2134 # Check for Boehm's garbage collector
2135 AC_ARG_ENABLE(objc-gc,
2136 [AS_HELP_STRING([--enable-objc-gc],
2137                 [enable use of Boehm's garbage collector with the
2138                  GNU Objective-C runtime])])
2139 AC_ARG_WITH([target-bdw-gc],
2140 [AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
2141                 [specify prefix directory for installed bdw-gc package.
2142                  Equivalent to --with-target-bdw-gc-include=PATH/include
2143                  plus --with-target-bdw-gc-lib=PATH/lib])])
2144 AC_ARG_WITH([target-bdw-gc-include],
2145 [AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
2146                 [specify directories for installed bdw-gc include files])])
2147 AC_ARG_WITH([target-bdw-gc-lib],
2148 [AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
2149                 [specify directories for installed bdw-gc library])])
2150
2151 case ,${enable_languages},:${enable_objc_gc} in *,objc,*:yes|*,objc,*:auto)
2152   AC_MSG_CHECKING([for bdw garbage collector])
2153   if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
2154     dnl no bdw-gw options, assume default locations
2155     AC_MSG_RESULT([using bdw-gc in default locations])
2156   else
2157     dnl bdw-gw options, first error checking, complete checking in libobjc
2158     if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
2159       AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
2160     elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
2161       AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
2162     else
2163       AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
2164     fi
2165   fi
2166 esac
2167
2168 # Disable libitm, libsanitizer, libvtv, liboffloadmic if we're not building C++
2169 case ,${enable_languages}, in
2170   *,c++,*)
2171     # Disable libitm, libsanitizer if we're not building libstdc++
2172     case "${noconfigdirs}" in
2173       *target-libstdc++-v3*)
2174         noconfigdirs="$noconfigdirs target-libitm target-libsanitizer"
2175         ;;
2176       *) ;;
2177     esac
2178     ;;
2179   *)
2180     noconfigdirs="$noconfigdirs target-liboffloadmic target-libitm target-libsanitizer target-libvtv"
2181     ;;
2182 esac
2183
2184 # Remove the entries in $skipdirs and $noconfigdirs from $configdirs,
2185 # $build_configdirs and $target_configdirs.
2186 # If we have the source for $noconfigdirs entries, add them to $notsupp.
2187
2188 notsupp=""
2189 for dir in . $skipdirs $noconfigdirs ; do
2190   dirname=`echo $dir | sed -e s/target-//g -e s/build-//g`
2191   if test $dir != .  && echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2192     configdirs=`echo " ${configdirs} " | sed -e "s/ ${dir} / /"`
2193     if test -r $srcdir/$dirname/configure ; then
2194       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2195         true
2196       else
2197         notsupp="$notsupp $dir"
2198       fi
2199     fi
2200   fi
2201   if test $dir != .  && echo " ${build_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2202     build_configdirs=`echo " ${build_configdirs} " | sed -e "s/ ${dir} / /"`
2203     if test -r $srcdir/$dirname/configure ; then
2204       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2205         true
2206       else
2207         notsupp="$notsupp $dir"
2208       fi
2209     fi
2210   fi
2211   if test $dir != . && echo " ${target_configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2212     target_configdirs=`echo " ${target_configdirs} " | sed -e "s/ ${dir} / /"`
2213     if test -r $srcdir/$dirname/configure ; then
2214       if echo " ${skipdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2215         true
2216       else
2217         notsupp="$notsupp $dir"
2218       fi
2219     fi
2220   fi
2221 done
2222
2223 # Quietly strip out all directories which aren't configurable in this tree.
2224 # This relies on all configurable subdirectories being autoconfiscated, which
2225 # is now the case.
2226 build_configdirs_all="$build_configdirs"
2227 build_configdirs=
2228 for i in ${build_configdirs_all} ; do
2229   j=`echo $i | sed -e s/build-//g`
2230   if test -f ${srcdir}/$j/configure ; then
2231     build_configdirs="${build_configdirs} $i"
2232   fi
2233 done
2234
2235 configdirs_all="$configdirs"
2236 configdirs=
2237 for i in ${configdirs_all} ; do
2238   if test -f ${srcdir}/$i/configure ; then
2239     configdirs="${configdirs} $i"
2240   fi
2241 done
2242
2243 target_configdirs_all="$target_configdirs"
2244 target_configdirs=
2245 for i in ${target_configdirs_all} ; do
2246   j=`echo $i | sed -e s/target-//g`
2247   if test -f ${srcdir}/$j/configure ; then
2248     target_configdirs="${target_configdirs} $i"
2249   fi
2250 done
2251
2252 # libiberty-linker-plugin is special: it doesn't have its own source directory,
2253 # so we have to add it after the preceding checks.
2254 if test x"$extra_linker_plugin_flags$extra_linker_plugin_configure_flags" != x
2255 then
2256   case " $configdirs " in
2257     *" libiberty "*)
2258       # If we can build libiberty, we can also build libiberty-linker-plugin.
2259       configdirs="$configdirs libiberty-linker-plugin"
2260       extra_linker_plugin_configure_flags="$extra_linker_plugin_configure_flags \
2261         --with-libiberty=../libiberty-linker-plugin";;
2262     *)
2263       AC_MSG_ERROR([libiberty missing]);;
2264   esac
2265 fi
2266
2267 # Sometimes we have special requirements for the host libiberty.
2268 extra_host_libiberty_configure_flags=
2269 extra_host_zlib_configure_flags=
2270 case " $configdirs " in
2271   *" lto-plugin "* | *" libcc1 "*)
2272     # When these are to be built as shared libraries, the same applies to
2273     # libiberty.
2274     extra_host_libiberty_configure_flags=--enable-shared
2275     ;;
2276   *" bfd "*)
2277     # When bfd is to be built as a shared library, the same applies to
2278     # zlib.
2279     if test "$enable_shared" = "yes"; then
2280       extra_host_zlib_configure_flags=--enable-host-shared
2281     fi
2282     ;;
2283 esac
2284 AC_SUBST(extra_host_libiberty_configure_flags)
2285 AC_SUBST(extra_host_zlib_configure_flags)
2286
2287 # Produce a warning message for the subdirs we can't configure.
2288 # This isn't especially interesting in the Cygnus tree, but in the individual
2289 # FSF releases, it's important to let people know when their machine isn't
2290 # supported by the one or two programs in a package.
2291
2292 if test -n "${notsupp}" && test -z "${norecursion}" ; then
2293   # If $appdirs is non-empty, at least one of those directories must still
2294   # be configured, or we error out.  (E.g., if the gas release supports a
2295   # specified target in some subdirs but not the gas subdir, we shouldn't
2296   # pretend that all is well.)
2297   if test -n "$appdirs" ; then
2298     for dir in $appdirs ; do
2299       if test -r $dir/Makefile.in ; then
2300         if echo " ${configdirs} " | grep " ${dir} " >/dev/null 2>&1; then
2301           appdirs=""
2302           break
2303         fi
2304         if echo " ${target_configdirs} " | grep " target-${dir} " >/dev/null 2>&1; then
2305           appdirs=""
2306           break
2307         fi
2308       fi
2309     done
2310     if test -n "$appdirs" ; then
2311       echo "*** This configuration is not supported by this package." 1>&2
2312       exit 1
2313     fi
2314   fi
2315   # Okay, some application will build, or we don't care to check.  Still
2316   # notify of subdirs not getting built.
2317   echo "*** This configuration is not supported in the following subdirectories:" 1>&2
2318   echo "    ${notsupp}" 1>&2
2319   echo "    (Any other directories should still work fine.)" 1>&2
2320 fi
2321
2322 case "$host" in
2323   *msdosdjgpp*)
2324     enable_gdbtk=no ;;
2325 esac
2326
2327 # To find our prefix, in gcc_cv_tool_prefix.
2328 ACX_TOOL_DIRS
2329
2330 copy_dirs=
2331
2332 AC_ARG_WITH([build-sysroot],
2333   [AS_HELP_STRING([--with-build-sysroot=SYSROOT],
2334                   [use sysroot as the system root during the build])],
2335   [if test x"$withval" != x ; then
2336      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
2337    fi],
2338   [SYSROOT_CFLAGS_FOR_TARGET=])
2339 AC_SUBST(SYSROOT_CFLAGS_FOR_TARGET)
2340
2341 AC_ARG_WITH([debug-prefix-map],
2342   [AS_HELP_STRING([--with-debug-prefix-map='A=B C=D ...'],
2343                   [map A to B, C to D ... in debug information])],
2344   [if test x"$withval" != x; then
2345      DEBUG_PREFIX_CFLAGS_FOR_TARGET=
2346      for debug_map in $withval; do
2347        DEBUG_PREFIX_CFLAGS_FOR_TARGET="$DEBUG_PREFIX_CFLAGS_FOR_TARGET -fdebug-prefix-map=$debug_map"
2348      done
2349    fi],
2350   [DEBUG_PREFIX_CFLAGS_FOR_TARGET=])
2351 AC_SUBST(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
2352
2353 # During gcc bootstrap, if we use some random cc for stage1 then CFLAGS
2354 # might be empty or "-g".  We don't require a C++ compiler, so CXXFLAGS
2355 # might also be empty (or "-g", if a non-GCC C++ compiler is in the path).
2356 # We want to ensure that TARGET libraries (which we know are built with
2357 # gcc) are built with "-O2 -g", so include those options when setting
2358 # CFLAGS_FOR_TARGET and CXXFLAGS_FOR_TARGET.
2359 if test "x$CFLAGS_FOR_TARGET" = x; then
2360   if test "x${is_cross_compiler}" = xyes; then
2361     CFLAGS_FOR_TARGET="-g -O2"
2362   else
2363     CFLAGS_FOR_TARGET=$CFLAGS
2364     case " $CFLAGS " in
2365       *" -O2 "*) ;;
2366       *) CFLAGS_FOR_TARGET="-O2 $CFLAGS_FOR_TARGET" ;;
2367     esac
2368     case " $CFLAGS " in
2369       *" -g "* | *" -g3 "*) ;;
2370       *) CFLAGS_FOR_TARGET="-g $CFLAGS_FOR_TARGET" ;;
2371     esac
2372   fi
2373 fi
2374 AC_SUBST(CFLAGS_FOR_TARGET)
2375
2376 if test "x$CXXFLAGS_FOR_TARGET" = x; then
2377   if test "x${is_cross_compiler}" = xyes; then
2378     CXXFLAGS_FOR_TARGET="-g -O2"
2379   else
2380     CXXFLAGS_FOR_TARGET=$CXXFLAGS
2381     case " $CXXFLAGS " in
2382       *" -O2 "*) ;;
2383       *) CXXFLAGS_FOR_TARGET="-O2 $CXXFLAGS_FOR_TARGET" ;;
2384     esac
2385     case " $CXXFLAGS " in
2386       *" -g "* | *" -g3 "*) ;;
2387       *) CXXFLAGS_FOR_TARGET="-g $CXXFLAGS_FOR_TARGET" ;;
2388     esac
2389   fi
2390 fi
2391 AC_SUBST(CXXFLAGS_FOR_TARGET)
2392
2393 AC_SUBST(LDFLAGS_FOR_TARGET)
2394
2395 # Handle --with-headers=XXX.  If the value is not "yes", the contents of
2396 # the named directory are copied to $(tooldir)/sys-include.
2397 if test x"${with_headers}" != x && test x"${with_headers}" != xno ; then
2398   if test x${is_cross_compiler} = xno ; then
2399     echo 1>&2 '***' --with-headers is only supported when cross compiling
2400     exit 1
2401   fi
2402   if test x"${with_headers}" != xyes ; then
2403     x=${gcc_cv_tool_prefix}
2404     copy_dirs="${copy_dirs} ${with_headers} $x/${target_noncanonical}/sys-include"
2405   fi
2406 fi
2407
2408 # Handle --with-libs=XXX.  If the value is not "yes", the contents of
2409 # the name directories are copied to $(tooldir)/lib.  Multiple directories
2410 # are permitted.
2411 if test x"${with_libs}" != x && test x"${with_libs}" != xno ; then
2412   if test x${is_cross_compiler} = xno ; then
2413     echo 1>&2 '***' --with-libs is only supported when cross compiling
2414     exit 1
2415   fi
2416   if test x"${with_libs}" != xyes ; then
2417     # Copy the libraries in reverse order, so that files in the first named
2418     # library override files in subsequent libraries.
2419     x=${gcc_cv_tool_prefix}
2420     for l in ${with_libs}; do
2421       copy_dirs="$l $x/${target_noncanonical}/lib ${copy_dirs}"
2422     done
2423   fi
2424 fi
2425
2426 # Set with_gnu_as, with_gnu_ld, and with_system_zlib as appropriate.
2427 #
2428 # This is done by determining whether or not the appropriate directory
2429 # is available, and by checking whether or not specific configurations
2430 # have requested that this magic not happen.
2431 #
2432 # The command line options always override the explicit settings in
2433 # configure.ac, and the settings in configure.ac override this magic.
2434 #
2435 # If the default for a toolchain is to use GNU as and ld, and you don't
2436 # want to do that, then you should use the --without-gnu-as and
2437 # --without-gnu-ld options for the configure script.  Similarly, if
2438 # the default is to use the included zlib and you don't want to do that,
2439 # you should use the --with-system-zlib option for the configure script.
2440
2441 if test x${use_gnu_as} = x &&
2442    echo " ${configdirs} " | grep " gas " > /dev/null 2>&1 ; then
2443   with_gnu_as=yes
2444   extra_host_args="$extra_host_args --with-gnu-as"
2445 fi
2446
2447 if test x${use_gnu_ld} = x &&
2448    echo " ${configdirs} " | egrep " (go)?ld " > /dev/null 2>&1 ; then
2449   with_gnu_ld=yes
2450   extra_host_args="$extra_host_args --with-gnu-ld"
2451 fi
2452
2453 if test x${use_included_zlib} = x &&
2454    echo " ${configdirs} " | grep " zlib " > /dev/null 2>&1 ; then
2455   :
2456 else
2457   with_system_zlib=yes
2458   extra_host_args="$extra_host_args --with-system-zlib"
2459 fi
2460
2461 # If using newlib, add --with-newlib to the extra_host_args so that gcc/configure
2462 # can detect this case.
2463
2464 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " target-newlib " > /dev/null 2>&1 ; then
2465   with_newlib=yes
2466   extra_host_args="$extra_host_args --with-newlib"
2467 fi
2468
2469 # Handle ${copy_dirs}
2470 set fnord ${copy_dirs}
2471 shift
2472 while test $# != 0 ; do
2473   if test -f $2/COPIED && test x"`cat $2/COPIED`" = x"$1" ; then
2474     :
2475   else
2476     echo Copying $1 to $2
2477
2478     # Use the install script to create the directory and all required
2479     # parent directories.
2480     if test -d $2 ; then
2481       :
2482     else
2483       echo >config.temp
2484       ${srcdir}/install-sh -c -m 644 config.temp $2/COPIED
2485     fi
2486
2487     # Copy the directory, assuming we have tar.
2488     # FIXME: Should we use B in the second tar?  Not all systems support it.
2489     (cd $1; tar -cf - .) | (cd $2; tar -xpf -)
2490
2491     # It is the responsibility of the user to correctly adjust all
2492     # symlinks.  If somebody can figure out how to handle them correctly
2493     # here, feel free to add the code.
2494
2495     echo $1 > $2/COPIED
2496   fi
2497   shift; shift
2498 done
2499
2500 # Determine a target-dependent exec_prefix that the installed
2501 # gcc will search in.  Keep this list sorted by triplet, with
2502 # the *-*-osname triplets last.
2503 md_exec_prefix=
2504 case "${target}" in
2505   i[[34567]]86-pc-msdosdjgpp*)
2506     md_exec_prefix=/dev/env/DJDIR/bin
2507     ;;
2508   *-*-hpux* | \
2509   *-*-nto-qnx* | \
2510   *-*-solaris2*)
2511     md_exec_prefix=/usr/ccs/bin
2512     ;;
2513 esac
2514
2515 extra_arflags_for_target=
2516 extra_nmflags_for_target=
2517 extra_ranlibflags_for_target=
2518 target_makefile_frag=/dev/null
2519 case "${target}" in
2520   spu-*-*)
2521     target_makefile_frag="config/mt-spu"
2522     ;;
2523   mips*-sde-elf* | mips*-mti-elf* | mips*-img-elf*)
2524     target_makefile_frag="config/mt-sde"
2525     ;;
2526   mipsisa*-*-elfoabi*)
2527     target_makefile_frag="config/mt-mips-elfoabi"
2528     ;;
2529   mips*-*-*linux* | mips*-*-gnu*)
2530     target_makefile_frag="config/mt-mips-gnu"
2531     ;;
2532   nios2-*-elf*)
2533     target_makefile_frag="config/mt-nios2-elf"
2534     ;;
2535   *-*-linux-android*)
2536     target_makefile_frag="config/mt-android"
2537     ;;
2538   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
2539     target_makefile_frag="config/mt-gnu"
2540     ;;
2541   *-*-aix4.[[3456789]]* | *-*-aix[[56789]].*)
2542     # nm and ar from AIX 4.3 and above require -X32_64 flag to all ar and nm
2543     # commands to handle both 32-bit and 64-bit objects.  These flags are
2544     # harmless if we're using GNU nm or ar.
2545     extra_arflags_for_target=" -X32_64"
2546     extra_nmflags_for_target=" -B -X32_64"
2547     ;;
2548 esac
2549
2550 alphaieee_frag=/dev/null
2551 case $target in
2552   alpha*-*-*)
2553     # This just makes sure to use the -mieee option to build target libs.
2554     # This should probably be set individually by each library.
2555     alphaieee_frag="config/mt-alphaieee"
2556     ;;
2557 esac
2558
2559 # If --enable-target-optspace always use -Os instead of -O2 to build
2560 # the target libraries, similarly if it is not specified, use -Os
2561 # on selected platforms.
2562 ospace_frag=/dev/null
2563 case "${enable_target_optspace}:${target}" in
2564   yes:*)
2565     ospace_frag="config/mt-ospace"
2566     ;;
2567   :d30v-*)
2568     ospace_frag="config/mt-d30v"
2569     ;;
2570   :m32r-* | :d10v-* | :fr30-* | :i?86*-*-elfiamcu)
2571     ospace_frag="config/mt-ospace"
2572     ;;
2573   no:* | :*)
2574     ;;
2575   *)
2576     echo "*** bad value \"${enable_target_optspace}\" for --enable-target-optspace flag; ignored" 1>&2
2577     ;;
2578 esac
2579
2580 # Some systems (e.g., one of the i386-aix systems the gas testers are
2581 # using) don't handle "\$" correctly, so don't use it here.
2582 tooldir='${exec_prefix}'/${target_noncanonical}
2583 build_tooldir=${tooldir}
2584
2585 # Create a .gdbinit file which runs the one in srcdir
2586 # and tells GDB to look there for source files.
2587
2588 if test -r ${srcdir}/.gdbinit ; then
2589   case ${srcdir} in
2590     .) ;;
2591     *) cat > ./.gdbinit <<EOF
2592 # ${NO_EDIT}
2593 dir ${srcdir}
2594 dir .
2595 source ${srcdir}/.gdbinit
2596 EOF
2597     ;;
2598   esac
2599 fi
2600
2601 # Make sure that the compiler is able to generate an executable.  If it
2602 # can't, we are probably in trouble.  We don't care whether we can run the
2603 # executable--we might be using a cross compiler--we only care whether it
2604 # can be created.  At this point the main configure script has set CC.
2605 we_are_ok=no
2606 echo "int main () { return 0; }" > conftest.c
2607 ${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
2608 if test $? = 0 ; then
2609   if test -s conftest || test -s conftest.exe ; then
2610     we_are_ok=yes
2611   fi
2612 fi
2613 case $we_are_ok in
2614   no)
2615     echo 1>&2 "*** The command '${CC} -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c' failed."
2616     echo 1>&2 "*** You must set the environment variable CC to a working compiler."
2617     rm -f conftest*
2618     exit 1
2619     ;;
2620 esac
2621 rm -f conftest*
2622
2623 # Decide which environment variable is used to find dynamic libraries.
2624 case "${host}" in
2625   *-*-hpux*) RPATH_ENVVAR=SHLIB_PATH ;;
2626   *-*-darwin*) RPATH_ENVVAR=DYLD_LIBRARY_PATH ;;
2627   *-*-mingw* | *-*-cygwin ) RPATH_ENVVAR=PATH ;;
2628   *) RPATH_ENVVAR=LD_LIBRARY_PATH ;;
2629 esac
2630
2631 # On systems where the dynamic library environment variable is PATH,
2632 # gcc/ will put dynamic libraries into a subdirectory to avoid adding
2633 # built executables to PATH.
2634 if test "$RPATH_ENVVAR" = PATH; then
2635   GCC_SHLIB_SUBDIR=/shlib
2636 else
2637   GCC_SHLIB_SUBDIR=
2638 fi
2639
2640 # Adjust the toplevel makefile according to whether bootstrap was selected.
2641 case $enable_bootstrap in
2642   yes)
2643     bootstrap_suffix=bootstrap
2644     BUILD_CONFIG=bootstrap-debug
2645     ;;
2646   no)
2647     bootstrap_suffix=no-bootstrap
2648     BUILD_CONFIG=
2649     ;;
2650 esac
2651
2652 AC_MSG_CHECKING(for default BUILD_CONFIG)
2653
2654 AC_ARG_WITH([build-config],
2655   [AS_HELP_STRING([--with-build-config='NAME NAME2...'],
2656                   [use config/NAME.mk build configuration])],
2657   [case $with_build_config in
2658    yes) with_build_config= ;;
2659    no) with_build_config= BUILD_CONFIG= ;;
2660    esac])
2661
2662 if test "x${with_build_config}" != x; then
2663   BUILD_CONFIG=$with_build_config
2664 else
2665   case $BUILD_CONFIG in
2666   bootstrap-debug)
2667     if echo "int f (void) { return 0; }" > conftest.c &&
2668        ${CC} -c conftest.c &&
2669        mv conftest.o conftest.o.g0 &&
2670        ${CC} -c -g conftest.c &&
2671        mv conftest.o conftest.o.g &&
2672        ${srcdir}/contrib/compare-debug conftest.o.g0 conftest.o.g > /dev/null 2>&1; then
2673       :
2674     else
2675       BUILD_CONFIG=
2676     fi
2677     rm -f conftest.c conftest.o conftest.o.g0 conftest.o.g
2678     ;;
2679   esac
2680 fi
2681 AC_MSG_RESULT($BUILD_CONFIG)
2682 AC_SUBST(BUILD_CONFIG)
2683
2684 # Use same top-level configure hooks in libgcc/libstdc++/libvtv.
2685 AC_MSG_CHECKING([for --enable-vtable-verify])
2686 AC_ARG_ENABLE(vtable-verify,
2687 [AS_HELP_STRING([--enable-vtable-verify],
2688                 [Enable vtable verification feature])],
2689 [case "$enableval" in
2690  yes) enable_vtable_verify=yes ;;
2691  no)  enable_vtable_verify=no ;;
2692  *)   enable_vtable_verify=no;;
2693  esac],
2694 [enable_vtable_verify=no])
2695 AC_MSG_RESULT($enable_vtable_verify)
2696
2697 # Record target_configdirs and the configure arguments for target and
2698 # build configuration in Makefile.
2699 target_configdirs=`echo "${target_configdirs}" | sed -e 's/target-//g'`
2700 build_configdirs=`echo "${build_configdirs}" | sed -e 's/build-//g'`
2701 bootstrap_fixincludes=no
2702
2703 # If we are building libgomp, bootstrap it.
2704 if echo " ${target_configdirs} " | grep " libgomp " > /dev/null 2>&1 ; then
2705   bootstrap_target_libs=${bootstrap_target_libs}target-libgomp,
2706 fi
2707
2708 # If we are building libsanitizer and $BUILD_CONFIG contains bootstrap-asan
2709 # or bootstrap-ubsan, bootstrap it.
2710 if echo " ${target_configdirs} " | grep " libsanitizer " > /dev/null 2>&1; then
2711   case "$BUILD_CONFIG" in
2712     *bootstrap-asan* | *bootstrap-ubsan* )
2713       bootstrap_target_libs=${bootstrap_target_libs}target-libsanitizer,
2714       bootstrap_fixincludes=yes
2715       ;;
2716   esac
2717 fi
2718
2719 # If we are building libvtv and --enable-vtable-verify, bootstrap it.
2720 if echo " ${target_configdirs} " | grep " libvtv " > /dev/null 2>&1 &&
2721    test "$enable_vtable_verify" != no; then
2722   bootstrap_target_libs=${bootstrap_target_libs}target-libvtv,
2723 fi
2724
2725 # Determine whether gdb needs tk/tcl or not.
2726 # Use 'maybe' since enable_gdbtk might be true even if tk isn't available
2727 # and in that case we want gdb to be built without tk.  Ugh!
2728 # In fact I believe gdb is the *only* package directly dependent on tk,
2729 # so we should be able to put the 'maybe's in unconditionally and
2730 # leave out the maybe dependencies when enable_gdbtk is false.  I'm not
2731 # 100% sure that that's safe though.
2732
2733 gdb_tk="maybe-all-tcl maybe-all-tk maybe-all-itcl maybe-all-libgui"
2734 case "$enable_gdbtk" in
2735   no)
2736     GDB_TK="" ;;
2737   yes)
2738     GDB_TK="${gdb_tk}" ;;
2739   *)
2740     # Only add the dependency on gdbtk when GDBtk is part of the gdb
2741     # distro.  Eventually someone will fix this and move Insight, nee
2742     # gdbtk to a separate directory.
2743     if test -d ${srcdir}/gdb/gdbtk ; then
2744       GDB_TK="${gdb_tk}"
2745     else
2746       GDB_TK=""
2747     fi
2748     ;;
2749 esac
2750 CONFIGURE_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-configure-/g`
2751 INSTALL_GDB_TK=`echo ${GDB_TK} | sed s/-all-/-install-/g`
2752
2753 # Strip out unwanted targets.
2754
2755 # While at that, we remove Makefiles if we were started for recursive
2756 # configuration, so that the top-level Makefile reconfigures them,
2757 # like we used to do when configure itself was recursive.
2758
2759 # Loop over modules.  We used to use the "$extrasub" feature from Autoconf
2760 # but now we're fixing up the Makefile ourselves with the additional
2761 # commands passed to AC_CONFIG_FILES.  Use separate variables
2762 # extrasub-{build,host,target} not because there is any reason to split
2763 # the substitutions up that way, but only to remain below the limit of
2764 # 99 commands in a script, for HP-UX sed.
2765
2766 # Do not nest @if/@endif or @unless/@endunless pairs, because
2767 # configure will not warn you at all.
2768
2769 case "$enable_bootstrap:$ENABLE_GOLD: $configdirs :,$stage1_languages," in
2770   yes:yes:*\ gold\ *:*,c++,*) ;;
2771   yes:yes:*\ gold\ *:*)
2772     AC_MSG_ERROR([in a combined tree, bootstrapping with --enable-gold requires c++ in stage1_languages])
2773     ;;
2774 esac
2775
2776 extrasub_build=
2777 for module in ${build_configdirs} ; do
2778   if test -z "${no_recursion}" \
2779      && test -f ${build_subdir}/${module}/Makefile; then
2780     echo 1>&2 "*** removing ${build_subdir}/${module}/Makefile to force reconfigure"
2781     rm -f ${build_subdir}/${module}/Makefile
2782   fi
2783   extrasub_build="$extrasub_build
2784 /^@if build-$module\$/d
2785 /^@endif build-$module\$/d
2786 /^@unless build-$module\$/,/^@endunless build-$module\$/d
2787 /^@if build-$module-$bootstrap_suffix\$/d
2788 /^@endif build-$module-$bootstrap_suffix\$/d
2789 /^@unless build-$module-$bootstrap_suffix\$/,/^@endunless build-$module-$bootstrap_suffix\$/d"
2790 done
2791 extrasub_host=
2792 for module in ${configdirs} ; do
2793   if test -z "${no_recursion}"; then
2794     for file in stage*-${module}/Makefile prev-${module}/Makefile ${module}/Makefile; do
2795       if test -f ${file}; then
2796         echo 1>&2 "*** removing ${file} to force reconfigure"
2797         rm -f ${file}
2798       fi
2799     done
2800   fi
2801   case ${module},${bootstrap_fixincludes} in
2802     fixincludes,no) host_bootstrap_suffix=no-bootstrap ;;
2803     *) host_bootstrap_suffix=$bootstrap_suffix ;;
2804   esac
2805   extrasub_host="$extrasub_host
2806 /^@if $module\$/d
2807 /^@endif $module\$/d
2808 /^@unless $module\$/,/^@endunless $module\$/d
2809 /^@if $module-$host_bootstrap_suffix\$/d
2810 /^@endif $module-$host_bootstrap_suffix\$/d
2811 /^@unless $module-$host_bootstrap_suffix\$/,/^@endunless $module-$host_bootstrap_suffix\$/d"
2812 done
2813 extrasub_target=
2814 for module in ${target_configdirs} ; do
2815   if test -z "${no_recursion}" \
2816      && test -f ${target_subdir}/${module}/Makefile; then
2817     echo 1>&2 "*** removing ${target_subdir}/${module}/Makefile to force reconfigure"
2818     rm -f ${target_subdir}/${module}/Makefile
2819   fi
2820
2821   # We only bootstrap target libraries listed in bootstrap_target_libs.
2822   case $bootstrap_target_libs in
2823     *,target-$module,*) target_bootstrap_suffix=$bootstrap_suffix ;;
2824     *) target_bootstrap_suffix=no-bootstrap ;;
2825   esac
2826
2827   extrasub_target="$extrasub_target
2828 /^@if target-$module\$/d
2829 /^@endif target-$module\$/d
2830 /^@unless target-$module\$/,/^@endunless target-$module\$/d
2831 /^@if target-$module-$target_bootstrap_suffix\$/d
2832 /^@endif target-$module-$target_bootstrap_suffix\$/d
2833 /^@unless target-$module-$target_bootstrap_suffix\$/,/^@endunless target-$module-$target_bootstrap_suffix\$/d"
2834 done
2835
2836 # Do the final fixup along with target modules.
2837 extrasub_target="$extrasub_target
2838 /^@if /,/^@endif /d
2839 /^@unless /d
2840 /^@endunless /d"
2841
2842 # Create the serialization dependencies.  This uses a temporary file.
2843
2844 AC_ARG_ENABLE([serial-configure],
2845 [AS_HELP_STRING([[--enable-serial-[{host,target,build}-]configure]],
2846                 [force sequential configuration of
2847                  sub-packages for the host, target or build
2848                  machine, or all sub-packages])])
2849
2850 case ${enable_serial_configure} in
2851   yes)
2852     enable_serial_build_configure=yes
2853     enable_serial_host_configure=yes
2854     enable_serial_target_configure=yes
2855     ;;
2856 esac
2857
2858 # These force 'configure's to be done one at a time, to avoid problems
2859 # with contention over a shared config.cache.
2860 rm -f serdep.tmp
2861 echo '# serdep.tmp' > serdep.tmp
2862 olditem=
2863 test "x${enable_serial_build_configure}" = xyes &&
2864 for item in ${build_configdirs} ; do
2865   case ${olditem} in
2866     "") ;;
2867     *) echo "configure-build-${item}: configure-build-${olditem}" >> serdep.tmp ;;
2868   esac
2869   olditem=${item}
2870 done
2871 olditem=
2872 test "x${enable_serial_host_configure}" = xyes &&
2873 for item in ${configdirs} ; do
2874   case ${olditem} in
2875     "") ;;
2876     *) echo "configure-${item}: configure-${olditem}" >> serdep.tmp ;;
2877   esac
2878   olditem=${item}
2879 done
2880 olditem=
2881 test "x${enable_serial_target_configure}" = xyes &&
2882 for item in ${target_configdirs} ; do
2883   case ${olditem} in
2884     "") ;;
2885     *) echo "configure-target-${item}: configure-target-${olditem}" >> serdep.tmp ;;
2886   esac
2887   olditem=${item}
2888 done
2889 serialization_dependencies=serdep.tmp
2890 AC_SUBST_FILE(serialization_dependencies)
2891
2892 # Base args.  Strip norecursion, cache-file, srcdir, host, build,
2893 # target, nonopt, and variable assignments.  These are the ones we
2894 # might not want to pass down to subconfigures.  The exception being
2895 # --cache-file=/dev/null, which is used to turn off the use of cache
2896 # files altogether, and which should be passed on to subconfigures.
2897 # Also strip program-prefix, program-suffix, and program-transform-name,
2898 # so that we can pass down a consistent program-transform-name.
2899 baseargs=
2900 tbaseargs=
2901 keep_next=no
2902 skip_next=no
2903 eval "set -- $ac_configure_args"
2904 for ac_arg
2905 do
2906   if test X"$skip_next" = X"yes"; then
2907     skip_next=no
2908     continue
2909   fi
2910   if test X"$keep_next" = X"yes"; then
2911     case $ac_arg in
2912       *\'*)
2913         ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
2914     esac
2915     baseargs="$baseargs '$ac_arg'"
2916     tbaseargs="$tbaseargs '$ac_arg'"
2917     keep_next=no
2918     continue
2919   fi
2920
2921   # Handle separated arguments.  Based on the logic generated by
2922   # autoconf 2.59.
2923   case $ac_arg in
2924     *=* | --config-cache | -C | -disable-* | --disable-* \
2925       | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
2926       | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
2927       | -with-* | --with-* | -without-* | --without-* | --x)
2928       separate_arg=no
2929       ;;
2930     -*)
2931       separate_arg=yes
2932       ;;
2933     *)
2934       separate_arg=no
2935       ;;
2936   esac
2937
2938   skip_targ=no
2939   case $ac_arg in
2940 changequote(,)
2941   --with-* | --without-*)
2942     libopt=`echo "$ac_arg" | sed -e 's,^--[^-_]*[-_],,' -e 's,=.*$,,'`
2943
2944     case $libopt in
2945     *[-_]include)
2946       lib=`echo "$libopt" | sed 's,[-_]include$,,'`
2947       ;;
2948     *[-_]lib)
2949       lib=`echo "$libopt" | sed 's,[-_]lib$,,'`
2950       ;;
2951     *)
2952       lib=$libopt
2953       ;;
2954     esac
2955 changequote([,])
2956
2957     case $lib in
2958     mpc | mpfr | gmp | isl)
2959       # If we're processing --with-$lib, --with-$lib-include or
2960       # --with-$lib-lib, for one of the libs above, and target is
2961       # different from host, don't pass the current argument to any
2962       # target library's configure.
2963       if test x$is_cross_compiler = xyes; then
2964         skip_targ=yes
2965       fi
2966       ;;
2967     esac
2968     ;;
2969   esac
2970
2971   case "$ac_arg" in
2972     --cache-file=/dev/null | \
2973     -cache-file=/dev/null )
2974       # Handled here to avoid the test to skip args below.
2975       baseargs="$baseargs '$ac_arg'"
2976       tbaseargs="$tbaseargs '$ac_arg'"
2977       # Assert: $separate_arg should always be no.
2978       keep_next=$separate_arg
2979       ;;
2980     --no*)
2981       continue
2982       ;;
2983     --c* | \
2984     --sr* | \
2985     --ho* | \
2986     --bu* | \
2987     --t* | \
2988     --program-* | \
2989     -cache_file* | \
2990     -srcdir* | \
2991     -host* | \
2992     -build* | \
2993     -target* | \
2994     -program-prefix* | \
2995     -program-suffix* | \
2996     -program-transform-name* )
2997       skip_next=$separate_arg
2998       continue
2999       ;;
3000     -*)
3001       # An option.  Add it.
3002       case $ac_arg in
3003         *\'*)
3004           ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
3005       esac
3006       baseargs="$baseargs '$ac_arg'"
3007       if test X"$skip_targ" = Xno; then
3008         tbaseargs="$tbaseargs '$ac_arg'"
3009       fi
3010       keep_next=$separate_arg
3011       ;;
3012     *)
3013       # Either a variable assignment, or a nonopt (triplet).  Don't
3014       # pass it down; let the Makefile handle this.
3015       continue
3016       ;;
3017   esac
3018 done
3019 # Remove the initial space we just introduced and, as these will be
3020 # expanded by make, quote '$'.
3021 baseargs=`echo "x$baseargs" | sed -e 's/^x *//' -e 's,\\$,$$,g'`
3022
3023 # Add in --program-transform-name, after --program-prefix and
3024 # --program-suffix have been applied to it.  Autoconf has already
3025 # doubled dollar signs and backslashes in program_transform_name; we want
3026 # the backslashes un-doubled, and then the entire thing wrapped in single
3027 # quotes, because this will be expanded first by make and then by the shell.
3028 # Also, because we want to override the logic in subdir configure scripts to
3029 # choose program_transform_name, replace any s,x,x, with s,y,y,.
3030 sed -e "s,\\\\\\\\,\\\\,g; s,','\\\\'',g; s/s,x,x,/s,y,y,/" <<EOF_SED > conftestsed.out
3031 ${program_transform_name}
3032 EOF_SED
3033 gcc_transform_name=`cat conftestsed.out`
3034 rm -f conftestsed.out
3035 baseargs="$baseargs --program-transform-name='${gcc_transform_name}'"
3036 tbaseargs="$tbaseargs --program-transform-name='${gcc_transform_name}'"
3037 if test "$silent" = yes; then
3038   baseargs="$baseargs --silent"
3039   tbaseargs="$tbaseargs --silent"
3040 fi
3041 baseargs="$baseargs --disable-option-checking"
3042 tbaseargs="$tbaseargs --disable-option-checking"
3043
3044 # Record and document user additions to sub configure arguments.
3045 AC_ARG_VAR([build_configargs],
3046            [additional configure arguments for build directories])
3047 AC_ARG_VAR([host_configargs],
3048            [additional configure arguments for host directories])
3049 AC_ARG_VAR([target_configargs],
3050            [additional configure arguments for target directories])
3051
3052 # For the build-side libraries, we just need to pretend we're native,
3053 # and not use the same cache file.  Multilibs are neither needed nor
3054 # desired.  We can't even use the same cache file for all build-side
3055 # libraries, as they're compiled differently; some with C, some with
3056 # C++ or with different feature-enabling options.
3057 build_configargs="$build_configargs --cache-file=./config.cache ${baseargs}"
3058
3059 # For host modules, accept cache file option, or specification as blank.
3060 case "${cache_file}" in
3061 "") # empty
3062   cache_file_option="" ;;
3063 /* | [[A-Za-z]]:[[\\/]]* ) # absolute path
3064   cache_file_option="--cache-file=${cache_file}" ;;
3065 *) # relative path
3066   cache_file_option="--cache-file=../${cache_file}" ;;
3067 esac
3068
3069 # Host dirs don't like to share a cache file either, horribly enough.
3070 # This seems to be due to autoconf 2.5x stupidity.
3071 host_configargs="$host_configargs --cache-file=./config.cache ${extra_host_args} ${baseargs}"
3072
3073 target_configargs="$target_configargs ${tbaseargs}"
3074
3075 # Passing a --with-cross-host argument lets the target libraries know
3076 # whether they are being built with a cross-compiler or being built
3077 # native.  However, it would be better to use other mechanisms to make the
3078 # sorts of decisions they want to make on this basis.  Please consider
3079 # this option to be deprecated.  FIXME.
3080 if test x${is_cross_compiler} = xyes ; then
3081   target_configargs="--with-cross-host=${host_noncanonical} ${target_configargs}"
3082 fi
3083
3084 # Special user-friendly check for native x86_64-linux build, if
3085 # multilib is not explicitly enabled.
3086 case "$target:$have_compiler:$host:$target:$enable_multilib" in
3087   x86_64-*linux*:yes:$build:$build:)
3088     # Make sure we have a development environment that handles 32-bit
3089     dev64=no
3090     echo "int main () { return 0; }" > conftest.c
3091     ${CC} -m32 -o conftest ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} conftest.c
3092     if test $? = 0 ; then
3093       if test -s conftest || test -s conftest.exe ; then
3094         dev64=yes
3095       fi
3096     fi
3097     rm -f conftest*
3098     if test x${dev64} != xyes ; then
3099       AC_MSG_ERROR([I suspect your system does not have 32-bit development libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib.])
3100     fi
3101     ;;
3102 esac
3103
3104 # Default to --enable-multilib.
3105 if test x${enable_multilib} = x ; then
3106   target_configargs="--enable-multilib ${target_configargs}"
3107 fi
3108
3109 # Pass --with-newlib if appropriate.  Note that target_configdirs has
3110 # changed from the earlier setting of with_newlib.
3111 if test x${with_newlib} != xno && echo " ${target_configdirs} " | grep " newlib " > /dev/null 2>&1 && test -d ${srcdir}/newlib ; then
3112   target_configargs="--with-newlib ${target_configargs}"
3113 fi
3114
3115 # Different target subdirs use different values of certain variables
3116 # (notably CXX).  Worse, multilibs use *lots* of different values.
3117 # Worse yet, autoconf 2.5x makes some of these 'precious', meaning that
3118 # it doesn't automatically accept command-line overrides of them.
3119 # This means it's not safe for target subdirs to share a cache file,
3120 # which is disgusting, but there you have it.  Hopefully this can be
3121 # fixed in future.  It's still worthwhile to use a cache file for each
3122 # directory.  I think.
3123
3124 # Pass the appropriate --build, --host, --target and --cache-file arguments.
3125 # We need to pass --target, as newer autoconf's requires consistency
3126 # for target_alias and gcc doesn't manage it consistently.
3127 target_configargs="--cache-file=./config.cache ${target_configargs}"
3128
3129 FLAGS_FOR_TARGET=
3130 case " $target_configdirs " in
3131  *" newlib "*)
3132   case " $target_configargs " in
3133   *" --with-newlib "*)
3134    case "$target" in
3135     *-cygwin*)
3136       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/cygwin -isystem $$s/winsup/cygwin/include'
3137       ;;
3138    esac
3139
3140    # If we're not building GCC, don't discard standard headers.
3141    if test -d ${srcdir}/gcc; then
3142      FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -nostdinc'
3143
3144      if test "${build}" != "${host}"; then
3145        # On Canadian crosses, CC_FOR_TARGET will have already been set
3146        # by `configure', so we won't have an opportunity to add -Bgcc/
3147        # to it.  This is right: we don't want to search that directory
3148        # for binaries, but we want the header files in there, so add
3149        # them explicitly.
3150        FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -isystem $$r/$(HOST_SUBDIR)/gcc/include -isystem $$r/$(HOST_SUBDIR)/gcc/include-fixed'
3151
3152        # Someone might think of using the pre-installed headers on
3153        # Canadian crosses, in case the installed compiler is not fully
3154        # compatible with the compiler being built.  In this case, it
3155        # would be better to flag an error than risking having
3156        # incompatible object files being constructed.  We can't
3157        # guarantee that an error will be flagged, but let's hope the
3158        # compiler will do it, when presented with incompatible header
3159        # files.
3160      fi
3161    fi
3162
3163    case "${target}-${is_cross_compiler}" in
3164    i[[3456789]]86-*-linux*-no)
3165       # Here host == target, so we don't need to build gcc,
3166       # so we don't want to discard standard headers.
3167       FLAGS_FOR_TARGET=`echo " $FLAGS_FOR_TARGET " | sed -e 's/ -nostdinc / /'`
3168       ;;
3169    *)
3170       # If we're building newlib, use its generic headers last, but search
3171       # for any libc-related directories first (so make it the last -B
3172       # switch).
3173       FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/newlib/ -isystem $$r/$(TARGET_SUBDIR)/newlib/targ-include -isystem $$s/newlib/libc/include'
3174
3175       # If we're building libgloss, find the startup file, simulator library
3176       # and linker script.
3177       case " $target_configdirs " in
3178         *" libgloss "*)
3179         # Look for startup file, simulator library and maybe linker script.
3180         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$$r/$(TARGET_SUBDIR)/libgloss/'"$libgloss_dir"
3181         # Look for libnosys.a in case the target needs it.
3182         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/libgloss/libnosys'
3183         # Most targets have the linker script in the source directory.
3184         FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$s/libgloss/'"$libgloss_dir"
3185         ;;
3186       esac
3187       ;;
3188    esac
3189    ;;
3190   esac
3191   ;;
3192 esac
3193
3194 case "$target" in
3195   x86_64-*mingw* | *-w64-mingw*)
3196   # MinGW-w64 does not use newlib, nor does it use winsup. It may,
3197   # however, use a symlink named 'mingw' in ${prefix} .
3198     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L${prefix}/${target}/lib -L${prefix}/mingw/lib -isystem ${prefix}/${target}/include -isystem ${prefix}/mingw/include'
3199     ;;
3200   *-mingw*)
3201   # MinGW can't be handled as Cygwin above since it does not use newlib.
3202     FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(TARGET_SUBDIR)/winsup/mingw -L$$r/$(TARGET_SUBDIR)/winsup/w32api/lib -isystem $$s/winsup/mingw/include -isystem $$s/winsup/w32api/include'
3203     ;;
3204 esac
3205
3206 # Allow the user to override the flags for
3207 # our build compiler if desired.
3208 if test x"${build}" = x"${host}" ; then
3209   CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}}
3210   CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}}
3211   LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}}
3212 fi
3213
3214 # On Canadian crosses, we'll be searching the right directories for
3215 # the previously-installed cross compiler, so don't bother to add
3216 # flags for directories within the install tree of the compiler
3217 # being built; programs in there won't even run.
3218 if test "${build}" = "${host}" && test -d ${srcdir}/gcc; then
3219   # Search for pre-installed headers if nothing else fits.
3220   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -B$(build_tooldir)/bin/ -B$(build_tooldir)/lib/ -isystem $(build_tooldir)/include -isystem $(build_tooldir)/sys-include'
3221 fi
3222
3223 if test "x${use_gnu_ld}" = x &&
3224    echo " ${configdirs} " | grep " ld " > /dev/null ; then
3225   # Arrange for us to find uninstalled linker scripts.
3226   FLAGS_FOR_TARGET=$FLAGS_FOR_TARGET' -L$$r/$(HOST_SUBDIR)/ld'
3227 fi
3228
3229 # Search for other target-specific linker scripts and such.
3230 case "${target}" in
3231   mep*)
3232     FLAGS_FOR_TARGET="$FLAGS_FOR_TARGET -mlibrary"
3233     ;;
3234 esac
3235
3236 # Makefile fragments.
3237 for frag in host_makefile_frag target_makefile_frag alphaieee_frag ospace_frag;
3238 do
3239   eval fragval=\$$frag
3240   if test $fragval != /dev/null; then
3241     eval $frag=${srcdir}/$fragval
3242   fi
3243 done
3244 AC_SUBST_FILE(host_makefile_frag)
3245 AC_SUBST_FILE(target_makefile_frag)
3246 AC_SUBST_FILE(alphaieee_frag)
3247 AC_SUBST_FILE(ospace_frag)
3248
3249 # Miscellanea: directories, flags, etc.
3250 AC_SUBST(RPATH_ENVVAR)
3251 AC_SUBST(GCC_SHLIB_SUBDIR)
3252 AC_SUBST(tooldir)
3253 AC_SUBST(build_tooldir)
3254 AC_SUBST(CONFIGURE_GDB_TK)
3255 AC_SUBST(GDB_TK)
3256 AC_SUBST(INSTALL_GDB_TK)
3257
3258 # Build module lists & subconfigure args.
3259 AC_SUBST(build_configargs)
3260 AC_SUBST(build_configdirs)
3261
3262 # Host module lists & subconfigure args.
3263 AC_SUBST(host_configargs)
3264 AC_SUBST(configdirs)
3265 AC_SUBST(target_configdirs)
3266
3267 # Target module lists & subconfigure args.
3268 AC_SUBST(target_configargs)
3269
3270
3271 # Build tools.
3272 AC_SUBST(AR_FOR_BUILD)
3273 AC_SUBST(AS_FOR_BUILD)
3274 AC_SUBST(CC_FOR_BUILD)
3275 AC_SUBST(CFLAGS_FOR_BUILD)
3276 AC_SUBST(CXXFLAGS_FOR_BUILD)
3277 AC_SUBST(CXX_FOR_BUILD)
3278 AC_SUBST(DLLTOOL_FOR_BUILD)
3279 AC_SUBST(GFORTRAN_FOR_BUILD)
3280 AC_SUBST(GOC_FOR_BUILD)
3281 AC_SUBST(GDC_FOR_BUILD)
3282 AC_SUBST(LDFLAGS_FOR_BUILD)
3283 AC_SUBST(LD_FOR_BUILD)
3284 AC_SUBST(NM_FOR_BUILD)
3285 AC_SUBST(RANLIB_FOR_BUILD)
3286 AC_SUBST(WINDMC_FOR_BUILD)
3287 AC_SUBST(WINDRES_FOR_BUILD)
3288
3289 # Generate default definitions for YACC, M4, LEX and other programs that run
3290 # on the build machine.  These are used if the Makefile can't locate these
3291 # programs in objdir.
3292 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
3293
3294 AC_CHECK_PROGS([YACC], ['bison -y' byacc yacc], [$MISSING bison -y])
3295 case " $build_configdirs " in
3296   *" bison "*) YACC='$$r/$(BUILD_SUBDIR)/bison/tests/bison -y' ;;
3297 esac
3298
3299 AC_CHECK_PROGS([BISON], [bison], [$MISSING bison])
3300 case " $build_configdirs " in
3301   *" bison "*) BISON='$$r/$(BUILD_SUBDIR)/bison/tests/bison' ;;
3302 esac
3303
3304 AC_CHECK_PROGS([M4], [gm4 gnum4 m4], [$MISSING m4])
3305 case " $build_configdirs " in
3306   *" m4 "*) M4='$$r/$(BUILD_SUBDIR)/m4/m4' ;;
3307 esac
3308
3309 AC_CHECK_PROGS([LEX], [flex lex], [$MISSING flex])
3310 case " $build_configdirs " in
3311   *" flex "*) LEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3312   *" lex "*) LEX='$$r/$(BUILD_SUBDIR)/lex/lex' ;;
3313 esac
3314
3315 AC_CHECK_PROGS([FLEX], [flex], [$MISSING flex])
3316 case " $build_configdirs " in
3317   *" flex "*) FLEX='$$r/$(BUILD_SUBDIR)/flex/flex' ;;
3318 esac
3319
3320 AC_CHECK_PROGS([MAKEINFO], makeinfo, [$MISSING makeinfo])
3321 case " $build_configdirs " in
3322   *" texinfo "*) MAKEINFO='$$r/$(BUILD_SUBDIR)/texinfo/makeinfo/makeinfo' ;;
3323   *)
3324 changequote(,)
3325     # For an installed makeinfo, we require it to be from texinfo 4.7 or
3326     # higher, else we use the "missing" dummy.
3327     if ${MAKEINFO} --version \
3328        | egrep 'texinfo[^0-9]*(4\.([7-9]|[1-9][0-9])|[5-9]|[1-9][0-9])' >/dev/null 2>&1; then
3329       :
3330     else
3331       MAKEINFO="$MISSING makeinfo"
3332     fi
3333     ;;
3334 changequote([,])
3335 esac
3336
3337 # FIXME: expect and dejagnu may become build tools?
3338
3339 AC_CHECK_PROGS(EXPECT, expect, expect)
3340 case " $configdirs " in
3341   *" expect "*)
3342     test $host = $build && EXPECT='$$r/$(HOST_SUBDIR)/expect/expect'
3343     ;;
3344 esac
3345
3346 AC_CHECK_PROGS(RUNTEST, runtest, runtest)
3347 case " $configdirs " in
3348   *" dejagnu "*)
3349     test $host = $build && RUNTEST='$$s/$(HOST_SUBDIR)/dejagnu/runtest'
3350     ;;
3351 esac
3352
3353
3354 # Host tools.
3355 NCN_STRICT_CHECK_TOOLS(AR, ar)
3356 NCN_STRICT_CHECK_TOOLS(AS, as)
3357 NCN_STRICT_CHECK_TOOLS(DLLTOOL, dlltool)
3358 NCN_STRICT_CHECK_TOOLS(LD, ld)
3359 NCN_STRICT_CHECK_TOOLS(LIPO, lipo)
3360 NCN_STRICT_CHECK_TOOLS(NM, nm)
3361 NCN_STRICT_CHECK_TOOLS(RANLIB, ranlib, true)
3362 NCN_STRICT_CHECK_TOOLS(STRIP, strip, true)
3363 NCN_STRICT_CHECK_TOOLS(WINDRES, windres)
3364 NCN_STRICT_CHECK_TOOLS(WINDMC, windmc)
3365 NCN_STRICT_CHECK_TOOLS(OBJCOPY, objcopy)
3366 NCN_STRICT_CHECK_TOOLS(OBJDUMP, objdump)
3367 NCN_STRICT_CHECK_TOOLS(OTOOL, otool)
3368 NCN_STRICT_CHECK_TOOLS(READELF, readelf)
3369 AC_SUBST(CC)
3370 AC_SUBST(CXX)
3371 AC_SUBST(CFLAGS)
3372 AC_SUBST(CXXFLAGS)
3373
3374 # Target tools.
3375 AC_ARG_WITH([build-time-tools],
3376   [AS_HELP_STRING([--with-build-time-tools=PATH],
3377                   [use given path to find target tools during the build])],
3378   [case x"$withval" in
3379      x/*) ;;
3380      *)
3381        with_build_time_tools=
3382        AC_MSG_WARN([argument to --with-build-time-tools must be an absolute path])
3383        ;;
3384    esac],
3385   [with_build_time_tools=])
3386
3387 NCN_STRICT_CHECK_TARGET_TOOLS(CC_FOR_TARGET, cc gcc)
3388 NCN_STRICT_CHECK_TARGET_TOOLS(CXX_FOR_TARGET, c++ g++ cxx gxx)
3389 NCN_STRICT_CHECK_TARGET_TOOLS(GCC_FOR_TARGET, gcc, ${CC_FOR_TARGET})
3390 NCN_STRICT_CHECK_TARGET_TOOLS(GFORTRAN_FOR_TARGET, gfortran)
3391 NCN_STRICT_CHECK_TARGET_TOOLS(GOC_FOR_TARGET, gccgo)
3392 NCN_STRICT_CHECK_TARGET_TOOLS(GDC_FOR_TARGET, gdc)
3393
3394 ACX_CHECK_INSTALLED_TARGET_TOOL(AR_FOR_TARGET, ar)
3395 ACX_CHECK_INSTALLED_TARGET_TOOL(AS_FOR_TARGET, as)
3396 ACX_CHECK_INSTALLED_TARGET_TOOL(DLLTOOL_FOR_TARGET, dlltool)
3397 ACX_CHECK_INSTALLED_TARGET_TOOL(LD_FOR_TARGET, ld)
3398 ACX_CHECK_INSTALLED_TARGET_TOOL(LIPO_FOR_TARGET, lipo)
3399 ACX_CHECK_INSTALLED_TARGET_TOOL(NM_FOR_TARGET, nm)
3400 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJCOPY_FOR_TARGET, objcopy)
3401 ACX_CHECK_INSTALLED_TARGET_TOOL(OBJDUMP_FOR_TARGET, objdump)
3402 ACX_CHECK_INSTALLED_TARGET_TOOL(OTOOL_FOR_TARGET, otool)
3403 ACX_CHECK_INSTALLED_TARGET_TOOL(RANLIB_FOR_TARGET, ranlib)
3404 ACX_CHECK_INSTALLED_TARGET_TOOL(READELF_FOR_TARGET, readelf)
3405 ACX_CHECK_INSTALLED_TARGET_TOOL(STRIP_FOR_TARGET, strip)
3406 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDRES_FOR_TARGET, windres)
3407 ACX_CHECK_INSTALLED_TARGET_TOOL(WINDMC_FOR_TARGET, windmc)
3408
3409 RAW_CXX_FOR_TARGET="$CXX_FOR_TARGET"
3410
3411 GCC_TARGET_TOOL(ar, AR_FOR_TARGET, AR, [binutils/ar])
3412 GCC_TARGET_TOOL(as, AS_FOR_TARGET, AS, [gas/as-new])
3413 GCC_TARGET_TOOL(cc, CC_FOR_TARGET, CC, [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3414 dnl see comments for CXX_FOR_TARGET_FLAG_TO_PASS
3415 GCC_TARGET_TOOL(c++, CXX_FOR_TARGET, CXX,
3416                 [gcc/xg++ -B$$r/$(HOST_SUBDIR)/gcc/ -nostdinc++ `if test -f $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags; then $(SHELL) $$r/$(TARGET_SUBDIR)/libstdc++-v3/scripts/testsuite_flags --build-includes; else echo -funconfigured-libstdc++-v3 ; fi` -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3417                 c++)
3418 GCC_TARGET_TOOL(c++ for libstdc++, RAW_CXX_FOR_TARGET, CXX,
3419                 [gcc/xgcc -shared-libgcc -B$$r/$(HOST_SUBDIR)/gcc -nostdinc++ -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/src/.libs -L$$r/$(TARGET_SUBDIR)/libstdc++-v3/libsupc++/.libs],
3420                 c++)
3421 GCC_TARGET_TOOL(dlltool, DLLTOOL_FOR_TARGET, DLLTOOL, [binutils/dlltool])
3422 GCC_TARGET_TOOL(gcc, GCC_FOR_TARGET, , [gcc/xgcc -B$$r/$(HOST_SUBDIR)/gcc/])
3423 GCC_TARGET_TOOL(gfortran, GFORTRAN_FOR_TARGET, GFORTRAN,
3424                 [gcc/gfortran -B$$r/$(HOST_SUBDIR)/gcc/], fortran)
3425 GCC_TARGET_TOOL(gccgo, GOC_FOR_TARGET, GOC,
3426                 [gcc/gccgo -B$$r/$(HOST_SUBDIR)/gcc/], go)
3427 GCC_TARGET_TOOL(gdc, GDC_FOR_TARGET, GDC,
3428                 [gcc/gdc -B$$r/$(HOST_SUBDIR)/gcc/], d)
3429 GCC_TARGET_TOOL(ld, LD_FOR_TARGET, LD, [ld/ld-new])
3430 GCC_TARGET_TOOL(lipo, LIPO_FOR_TARGET, LIPO)
3431 GCC_TARGET_TOOL(nm, NM_FOR_TARGET, NM, [binutils/nm-new])
3432 GCC_TARGET_TOOL(objcopy, OBJCOPY_FOR_TARGET, OBJCOPY, [binutils/objcopy])
3433 GCC_TARGET_TOOL(objdump, OBJDUMP_FOR_TARGET, OBJDUMP, [binutils/objdump])
3434 GCC_TARGET_TOOL(otool, OTOOL_FOR_TARGET, OTOOL)
3435 GCC_TARGET_TOOL(ranlib, RANLIB_FOR_TARGET, RANLIB, [binutils/ranlib])
3436 GCC_TARGET_TOOL(readelf, READELF_FOR_TARGET, READELF, [binutils/readelf])
3437 GCC_TARGET_TOOL(strip, STRIP_FOR_TARGET, STRIP, [binutils/strip-new])
3438 GCC_TARGET_TOOL(windres, WINDRES_FOR_TARGET, WINDRES, [binutils/windres])
3439 GCC_TARGET_TOOL(windmc, WINDMC_FOR_TARGET, WINDMC, [binutils/windmc])
3440
3441 AC_SUBST(FLAGS_FOR_TARGET)
3442 AC_SUBST(RAW_CXX_FOR_TARGET)
3443
3444 # Certain tools may need extra flags.
3445 AR_FOR_TARGET=${AR_FOR_TARGET}${extra_arflags_for_target}
3446 RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET}${extra_ranlibflags_for_target}
3447 NM_FOR_TARGET=${NM_FOR_TARGET}${extra_nmflags_for_target}
3448
3449 # When building target libraries, except in a Canadian cross, we use
3450 # the same toolchain as the compiler we just built.
3451 COMPILER_AS_FOR_TARGET='$(AS_FOR_TARGET)'
3452 COMPILER_LD_FOR_TARGET='$(LD_FOR_TARGET)'
3453 COMPILER_NM_FOR_TARGET='$(NM_FOR_TARGET)'
3454 if test $host = $build; then
3455   case " $configdirs " in
3456     *" gcc "*)
3457       COMPILER_AS_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/as'
3458       COMPILER_LD_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/collect-ld'
3459       COMPILER_NM_FOR_TARGET='$$r/$(HOST_SUBDIR)/gcc/nm'${extra_nmflags_for_target}
3460       ;;
3461   esac
3462 fi
3463
3464 AC_SUBST(COMPILER_AS_FOR_TARGET)
3465 AC_SUBST(COMPILER_LD_FOR_TARGET)
3466 AC_SUBST(COMPILER_NM_FOR_TARGET)
3467
3468 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
3469 AC_ARG_ENABLE(maintainer-mode,
3470 [AS_HELP_STRING([--enable-maintainer-mode],
3471                 [enable make rules and dependencies not useful
3472                  (and sometimes confusing) to the casual installer])],
3473       USE_MAINTAINER_MODE=$enableval,
3474       USE_MAINTAINER_MODE=no)
3475 AC_MSG_RESULT($USE_MAINTAINER_MODE)
3476 AC_SUBST(MAINTAINER_MODE_TRUE)
3477 AC_SUBST(MAINTAINER_MODE_FALSE)
3478 if test "$USE_MAINTAINER_MODE" = yes; then
3479   MAINTAINER_MODE_TRUE=
3480   MAINTAINER_MODE_FALSE='#'
3481 else
3482   MAINTAINER_MODE_TRUE='#'
3483   MAINTAINER_MODE_FALSE=
3484 fi
3485 MAINT=$MAINTAINER_MODE_TRUE
3486 AC_SUBST(MAINT)dnl
3487
3488 # ---------------------
3489 # GCC bootstrap support
3490 # ---------------------
3491
3492 # Stage specific cflags for build.
3493 stage1_cflags="-g"
3494 case $build in
3495   vax-*-*)
3496     case ${GCC} in
3497       yes) stage1_cflags="-g -Wa,-J" ;;
3498       *) stage1_cflags="-g -J" ;;
3499     esac ;;
3500 esac
3501
3502 AC_SUBST(stage1_cflags)
3503
3504 # Enable --enable-checking in stage1 of the compiler.
3505 AC_ARG_ENABLE(stage1-checking,
3506 [AS_HELP_STRING([[--enable-stage1-checking[=all]]],
3507                 [choose additional checking for stage1 of the compiler])],
3508 [stage1_checking=--enable-checking=${enable_stage1_checking}],
3509 [if test "x$enable_checking" = xno || test "x$enable_checking" = x; then
3510   # For --disable-checking or implicit --enable-checking=release, avoid
3511   # setting --enable-checking=gc in the default stage1 checking for LTO
3512   # bootstraps.  See PR62077.
3513   case $BUILD_CONFIG in
3514     *lto*)
3515       stage1_checking=--enable-checking=release,misc,gimple,rtlflag,tree,types;;
3516     *)
3517       stage1_checking=--enable-checking=yes,types;;
3518   esac
3519   if test "x$enable_checking" = x && \
3520      test -d ${srcdir}/gcc && \
3521      test x"`cat ${srcdir}/gcc/DEV-PHASE`" = xexperimental; then
3522     stage1_checking=--enable-checking=yes,types,extra
3523   fi
3524 else
3525   stage1_checking=--enable-checking=$enable_checking,types
3526 fi])
3527 AC_SUBST(stage1_checking)
3528
3529 # Enable -Werror in bootstrap stage2 and later.
3530 AC_ARG_ENABLE(werror,
3531 [AS_HELP_STRING([--enable-werror],
3532                 [enable -Werror in bootstrap stage2 and later])],
3533 [
3534 case ${enable_werror} in
3535   yes) stage2_werror_flag="--enable-werror-always" ;;
3536   *) stage2_werror_flag="" ;;
3537 esac
3538 ],
3539 [
3540 if test -d ${srcdir}/gcc && test x"`cat $srcdir/gcc/DEV-PHASE`" = xexperimental; then
3541   case $BUILD_CONFIG in
3542   bootstrap-debug)
3543       stage2_werror_flag="--enable-werror-always" ;;
3544   "")
3545       stage2_werror_flag="--enable-werror-always" ;;
3546   esac
3547 fi
3548 ])
3549
3550 AC_SUBST(stage2_werror_flag)
3551
3552 # Specify what files to not compare during bootstrap.
3553
3554 compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/*"
3555 case "$target" in
3556   hppa*64*-*-hpux*) ;;
3557   hppa*-*-hpux*) compare_exclusions="gcc/cc*-checksum\$(objext) | */libgcc/lib2funcs* | gcc/ada/*tools/* | gcc/function-tests.o" ;;
3558   powerpc*-ibm-aix*) compare_exclusions="gcc/cc*-checksum\$(objext) | gcc/ada/*tools/* | *libgomp*\$(objext)" ;;
3559 esac
3560 AC_SUBST(compare_exclusions)
3561
3562 AC_CONFIG_FILES([Makefile],
3563   [sed "$extrasub_build" Makefile |
3564    sed "$extrasub_host" |
3565    sed "$extrasub_target" > mf$$
3566    mv -f mf$$ Makefile],
3567   [extrasub_build="$extrasub_build"
3568    extrasub_host="$extrasub_host"
3569    extrasub_target="$extrasub_target"])
3570 AC_OUTPUT